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Macs, Movies, Games, Books, etc. The Rants of a Mad Man.

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What is a Retina display

June 18th, 2012 by Raj

This article was originally written for MacTalk.
It appeared as an editorial on their home page June 18th, 2012.

“Retina display” it’s Apple’s latest buzzword that’s slowly mulling its way across their entire product line. Most recently recently bursting from its former iOS bounds and landing amid Apple’s newest MacBook Pro lineup announced just days ago at WWDC 2012. But what is exactly is a Retina display? How does it affect you as a consumer or perhaps you as a developer? Do I want one? Well in the words of Dr Deane Hutton “I’m glad you asked”…

To understand what a Retina display is we’re going to jump back to some of the basics that make up your computer’s (or phone’s, or tablet’s) display. Every screen is made up of pixels, tiny dots of light that are told what colour they should be by your computer. Thousands of these pixels line your display and together in their combination of colours create the visual imagery that you see and interact with on your screen. Where things get interesting is when we look at the density of the pixels or rather how many of them are crammed into the physical size of your screen referred to by the term “pixels per inch” (PPI).

PPI is calculated through a relatively simple little formula of which the crux is the number of pixels diagonally across your screen divided by its physical diagonal size. For example Apple’s smaller iMac which has a viewable diagonal screen size of 21.5 inches at a display resolution of 1900×1200 equates to a PPI of 102.46. Had the same display resolution been on physically smaller screen, say 15 inches diagonal the PPI would be much higher at 149.81.

Having a higher PPI means the pixels are bunched up much finer and can lead to a more crisp image to the viewer. Technology in display manufacturing has been slowly leading up to the point where now we can create displays with such a high PPI that according to Apple they are of such a high density that from a normal viewing point we can no longer see the lines between the pixels and it is this high density that Apple loosely refers to as a “Retina display”. To quote Steve Jobs at the unveiling of the iPhone 4, Apple’s first product with a Retina display:
“…there’s a magic number around 300dpi, if you hold something about 10-12 inches away from your eye, it’s the limit of the human retina to distinguish pixels.”

The original iPhone and it’s successors up until the iPhone 4 all had a resolution of 320×480 with a PPI of 163. With the launch of the iPhone 4 the resolution doubled to become 640×960, 326 PPI. The increase by exactly double is no accident either and you may have already noticed that the new MacBook Pro’s resolution is exactly double its predecessor’s too. 2880×1800 to it’s former non-retina self of 1440×900. So why is this? Well, it keep everything in proportion. For the user if you’re looking at a web page or running an app that was built using the lesser resolution the system can double everything quite easily and not ruin the ratio of the material. The downside is that as the technology begins to expand across new product lines you’ll see an almost never-ending game of catch up as developers must include larger versions of all the imagery included in their software so that it looks as it should, until that happens the software does its best to blow things up to their newly doubled size often leaving them blurry and uneasy on the eye.

For now the introduction of Retina displays into the Mac product family means more work for developers to double the size of their image assets. For the end-user, once their apps are updated they’ll enjoy a much more pleasant aesthetic experience and be able to truly reap the rewards of their wonderful display. The same goes for web developers, in a world where Retina displays become the norm the web will migrate to non-vector imagery doubled in size to accommodate these higher PPI displays. This may be a while away as Apple are technically the only people out there pushing the displays into the market at present but there are already Retina displayed imagery on a lot of websites as the iPhone & iPad take advantage of them already, accounting for the lion share of mobile traffic.

To break it down as a developer (web or app) you’ll be creating rasterized assets at double the size (and again at half if you want to do the job properly), for the end-user you’ll be complaining on Twitter and Facebook that your favourite app looks funny until you get an update. Unfortunate but true.

Lastly let’s all understand that “Retina display” is nothing more than an Apple trademarked name of higher pixel density displayed. It is NOT an industry standard nor patent of technology held by Apple, it’s a marketing term. Other computer manufacturers such as Dell or HP may not have a competing displays at this point but if they did they don’t have to create it to the same standard as Apple nor would they call it “Retina display”.

References:

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“OAuth Explained” blog posted on SitePoint

August 17th, 2010 by Raj

It’s official, I am now a professional “blog/tech writer-like-person” being that I was paid to write something nerdy and it was placed on the Internet. w00t bitches!

What pray-tell is this first piece about? Well, have you heard of a little ole protocol called “OAuth“? Hey… hey… have ya??! Oh. You haven’t, well all the more reason you should read the article then because I do promise it to be a very entertaining read.

Thanks must of course go to the good people who have contracted me to write this, and an upcoming “how-to” piece on the same topic, SitePoint. For without their good cash I could not brandish the title “professional”. Props.

So what are you waiting for?? Check it out for yourself here:
http://www.sitepoint.com/blogs/2010/08/17/oauth-explained-with-foursquar/

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t-JAY & a-JAY headphones review

August 6th, 2010 by Raj

It would appear that I have somehow become “The Headphone Guy” for MacTalk reviewing not one, not two, but SIX sets of headphones from manufacture JAYS in my latest tech rambling review.

For those of you interested in the audio phonic delights of headphone glory please jump over and check out the review yourself. Others may be more interested in the photos of the units, which I took myself on my new Canon 7D, these can be viewed in more detail here.

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Is the iPad really the best e-book reader? I say no.

July 14th, 2010 by Raj

In what could be construed as a modern day version of “rock, paper, scissors” usability gurus Nielsen Norman have released a report paper pitting today’s most common e-book readers against one another, whilst throwing ye-olde paper in for good measure.

Revealing Apple’s iPad as the favoured device many websites, be them Apple-centric or not, have been touting their findings as the death knell for conventional e-book readers and sprouting figures at how we will undoubtably see the cannibalising of Amazon’s 80% market share, let alone the never-ending debate over paper’s so-called demise.

I can’t but help think the entire report as a waste of time pitting apples against oranges in a pineapple competition. Conventional e-book readers such as Amazon’s “Kindle”, Barnes & Noble “Nook” and the old stable horse from Sony “Reader” are E Ink driven devices. Their screens the closest digital representation we have to paper yet. They do not entail glossy glass reflections under any and every light source in the known universe and their battery life is measured in page turns lasting months (if not years) and not in minutes switched on. They’re designed to “read” books.

The iPad on the other hand is not a dedicated e-book reader, it is a computer, or at least a multimedia device that happens to offer an application(s) to read and purchase books on. It’s higher “User Satisfaction” rating (5.7/10) over Amazon’s Kindle 5.6 (paper won at 5.8) can be put down to the products slick user interface, colour and application use, easily overlooking the fact that consistent page by page reading is little to no different to reading from your desktop computer’s screen in terms of ease on the eye. The PC scored a paltry 3.6 I might add.

In addition to which gadget the subjects enjoyed best a metric based upon the speed at which each device was read at compared to paper was also devised. Alas, the results were apparently completely useless, as noted by Neilsen stating “…the only fair conclusion is that we can’t say for sure which device offers the fastest reading speed.” leaving me to wonder again what the point of this report was?

It would appear that the introduction of the iPad has indeed ruffled some feathers, despite it’s adhoc grouping under the e-book reader banner, Amazon has recently released an update and price drop to its Kindle DX, following suit in Barnes & Noble and Sony’s footsteps of a price reduction. The promise of a more “interactive” experience amongst the future of digital publishing is enough to sway general e-book consumers to a more vibrant reading platform but I challenge any person, be they digital evangelist or not, to read twenty pages of anything on the iPad and then do the same on any E Ink device and tell me it wasn’t a better “reading” experience with E Ink.

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Apple release new Mac Mini with HDMI

June 17th, 2010 by Raj

Apple released a long anticipated update to its Mac Mini line Monday morning. The new enclosure with in-built power supply and HDMI connectivity alone has home-theatre PC (HTPC) enthusiasts salivating whilst further blurring the line between the AppleTV’s usefulness and novelty factor.

The new 2010 Mac Mini includes:

  • 2.4GHz or 2.66GHz Intel Core 2 Duo
  • 1.4″ thick Unibody enclosure
  • NVIDIA GeForce 320M Graphics Card
  • Built-in Power Supply
  • HDMI port and Mini DisplayPort
  • User accessible memory slot
  • Ethernet, FireWire 800, 4xUSB 2.0 ports
  • Secure Digital (SD) card slot
  • Analogue/Digital Audio Line out

Whilst the updates (and the immediate availability) are a welcome announcement the additional US$100 price tag has many punters up in arms. The Mac Mini is available starting from US$699 (AUD$999).

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My first Cocoa adventure: The Huawei E169 Monitor

December 20th, 2009 by Raj

E169Monitor

Having moved in to a new place a few months ago I was once again greeted with the issue of not having an internet connection until the powers that be connected the relevant wires and flicked their respective switches. This; an all far too familiar occurrence I’ve had dealt with in a timely fashion in times gone by (it helped when you worked for a telco) would this time blow out to well over a month to which point relying on my iPhone would not cut it. Coming to my rescue a good friend (thank you Gavlar) bestowed upon me a USB wireless internet dongle that would suffice my addiction until normality was restored with some ADSL.

Armed with an Optus flashed Huawei E169 I was quick to find that at the time there was no software around that was compatible with the relevantly new Mac OS X – Snow Leopard (10.6.x). The solution was to set up the device as you would any other modem and install some lovely modem scripts and what not from Huawei’s website, this got you online but I then found my next problem, reception! It seemed that the Optus network had a little difficulty in particular areas of my CBD apartment and not having an real software to report things like signal strength and data network I spent a good amount of time walking around my place laptop in hands “guessing” that the reception was actually best 1m to the left of my kitchen stove at ground level laying on the floor.

As you can imagine I quickly got sick of that game and thusly decided I’d take a look at just how complicated it was to find out the signal strength was directly from the device. A few googles later and I’d opened a connection directly to the serial device through the terminal and was now actively seeing what I was after albeit in a rather nerdy fashion. Coincidently at the same time as this I was ploughing through Aaron Hillegass’ 3rd edition of “Cocoa Programming for Mac OS X” and thought to myself “Hey, why not create a program to scrape this nerdy jargon and present it visually.” and that’s exactly what I did.

So here you’ll find a little program I like to call the E169 Monitor, because that’s pretty much what it does, monitor your E169’s data connection reporting back on things like signal strength and network connection type (WCDMA, HSDPA, etc) as well as giving you a couple of buttons to connect and disconnect.

Credit where credit is due; a lot of the code in here would not have been possible had it not been for the wonderful AMSerialPort project that makes connecting and reading from serial (USB) connections so much easier than the standard Cocoa libraries and to make the whole connect/disconnect functionality work (and I’m still not sure I understand) I’ve borrowed heavily from the source of the now defunct CheetahWatch, a program which essentially did everything I’ve done and more back in the days of the E220 and OS X 10.4. I really wish this project was picked up again and nurtured because it is a really fantastic effort, if I actually owned one of these wireless cards I think I’d even try an revive it myself, even with my rather fledgling cocoa skills.

Rambling and thanks aside a link to my Xcode project is available here & below. Do with it as you will but please be aware that I’m offering no support, this is all just a learning experience for me that I thought others may find useful. I’ve only tested this code on my own machine, an Intel based MBP running 10.6.2. I hope you can get some use out of it, I had fun doing it and throwing back to the days I used to have to manually enter AT commands to dial the local BBS.

Download my E169 Monitor Xcode Project files. (3.1MB)

Useful Resources: AMSerialPort Project, CheetahWatch application

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A Hard Drive & A Time Machine

July 7th, 2009 by Raj

timemachineUnfortunately it’s been a while since I’ve had a chance to do anything particularly nerdy let alone blog about it, thankfully for my adorning masses I’ve chosen to make my “back-in-the-saddle” return with a jump straight in to the deep end. That and quietly going for the record of how many cliche metaphors one can use in the same sentence.

You see just this week gone by I found myself in the unusual position of nerd boredom. I hadn’t done anything really “hands-dirty-nerdy” and my little girly hands were an itch with possibilities. The new Apple Macbook Pro’s had just been released for starters and it took all my will power to not just dash out and buy one for example but I was blessed (or smote) by the good lords of geek with the ghastly sound of a hard drive platter scraping from inside my Macbook Pro’s Aluminium enclosure. Again, scrounging every last fiber of restraint to not run out and buy a new laptop I decided to take the high road and upgrade the hard drive and keep my existing rig, both satisfying my need for nerd and keeping my costs at a 20th of the cost.

Normally, had I opted to purchase a new machine, I start from scratch, reinstalling everything, copying over Mail Libraries, Photos, etc manually and giving myself a fresh start, but as I was only giving the old girl a new ticker I thought I’d do a straight copy restoring my file hierarchy to its full glory via the use of my Time Machine backups. A trick of the Mac trade I’ve yet to make use of.

The hard drive install was as straight forward as can be, a few screws here a torque screwdriver there and Bob’s your Grandfather’s Nephew she was humming to the new tune of a 500GB 7200rpm drive. The next and what i’d also envisaged to be the more lengthy portion of the process of the restoration process then began.

Mac OS X install DVD whirring away in the drive, we arrived at the “Migration Assistant” portion of the install offering the option of “Restoring from a Time Machine backup”. Excellent, that’s exactly what I’d like to do thanks. A click or two later I had a screen asking me what user accounts and applications I’d like to restore, selecting them all and clicking Next I began the two hour wait for the copying process to complete. One movie length break later I returned to see that the progress bar and status text had indeed indicated that everything was all tikity-boo but I was unable to continue on to the next step. I thought I’d just let it whir away for a while, sometimes these progress bars are less than accurate (at a stretch) and I figured it’d all be over soon enough. Two episodes of Deadwood later and there was still no movement to which I threw it in and restarted the `puter myself. Everything booted up fine, even had my user account there for me to log in to but that was about the end of the good news. A Dock riddled with question marks and no mail to be found it looked like the only things that had actually been copied successfully was my Network System Preferences, connecting to my Wi-Fi as soon as it logged in. Balls.

By this time it was about 10pm and I couldn’t be ferked sitting there doing a manual copy so I thought, “You know what Time Machine/Migration Assistant Restore Process, I’m going to give you one more crack of the whip. Balls this up again and the engagement is off!!” So after reformatting and going through the OS X install process again to begin the restoration it was about midnight and I left it all to whizz away as I dreamt of ponies and unicorns battling to death in the Roman Colosseum; as you do.

Waking the next morn to find a beautiful dew adorning my bedroom windows there was a smell of success in the air. Perhaps it was the restoration had worked and I was about to be full of glee, yet again it could’ve been the new air freshener I’d purchased the day before permeating its aroma through out the house? Fortunately for my sanity and the now back on again wedding between myself and Apple technology it was the former and there before me stood the exact same desktop as a day before, same wallpaper, same icons, same file system, same launch items on login, had Time Machine fulfilled its end of the bargain to my wildest dreams?! It would appear so!

Everything appeared to be exactly where I’d left it prior to the transplant. Wrapped! No idea exactly how long it took to complete having let it go whilst asleep but we can safely say it was over two hours (120Gb of data to copy via USB2) and less than twelve (I slept in!) But really, who cares, IT’S ALIVE!!!

Now all of that was a few days ago… and while everything seemed perfect from the casual observers point of view, it would seem that deep down in the bowels of a file system that I roll with there have been a few “issues”, allow me to list them for you now…

  • Pretty much anything out of the normal “Mac” root folders gets missed. For instance my SVN repository in /svn hasn’t been backed up or restored.
  • Similarly all of the stupid OS X apache example files are back in /Library/WebServer/Documents and my /etc/httpd.conf file has been overwritten
  • Aperture wouldn’t launch, my photos were fine but I had to reinstall the application
  • I had to do OS X updates all over again from 10.5.2 (Which was on the discs that came with the Mac)
  • My Nortel/Apani VPN software had to be reinstalled and didn’t work at all to begin with

All in all, a very small price to pay, and not a lot of work to get things back to normal considering all of my preferences, my mail, calendars, contacts, images, movies, music, applications were back and working. So I guess the question is whether or not I’d use this method the next time or not. Well, yes I would, but if it was a new Mac I was about to obtain I’d most likely stick to my tried and true method of a fresh install & manual copy. Why? Well, I come from an old school and tend to “clutter” a machine over time, an issue your average ham sandwich [person] is unlikely to have.

So go forth, propagate your Mac’s hard drive Guy Pearce style and feel safe about doing so, the process actually works.

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Review: Rock Band (Australia)

October 12th, 2008 by Raj

While the rest of the world enjoys the spoils of Harmonix’s latest efforts with the recent release of Rock Band 2 Australians, whom have yet to see any version of the franchise land upon its shores, will have to be content with the announcement that coming November 7th they too can finally begin their rock journeys with the release of the first iteration, the same version that is now over a year old for everyone else.

For anyone that has played Guitar Hero, Rock Band is going to be of familiar territory. The game revolves around the usual rhythm formula of coloured “notes” flowing down the screen that need to be hit when crossing a particular point. The more notes you hit in a row the more your score multiplier increases and should you not hit enough you bomb out of the song to the boos of a disappointed virtual crowd. Where Rock Band differentiates itself is that you not only have the option of playing the guitar portions of the songs but you know have a complete “band” of instruments to play (and sing) including lead guitar, bass guitar, drums and vocals. Think of it as Guitar Hero meets SingStar with a drum kit.

Rock Band provide two primary modes of gameplay, a “Solo Tour” mode and “Band World Tour” mode, which requires at least two players. The solo mode follows the same tried and tested formula of performing a few tracks on your desired instrument (excluding bass, which is only available in Band World Tour mode) until you’ve done enough to unlock the next venue and the new tracks that come along with it whilst growing in difficulty to play/sing. Depending on which instrument you choose to use the track list changes order due to the songs being of different difficulties for the individual mediums.

Band World Tour mode breaks the regular mould of linear track progression. Requiring at least one other person in the room rocking out with you, the World Tour mode challenges you to create a band poised to take over the world, earning fans, money, and accolades throughout your bands evolution. Starting with gigs in your hometown your band will go on to earn vans, tour buses and even private jets to play in any of the 41 venues in over 17 cities around the globe. You can even choose to play benefit gigs that earn you a larger fan base but no monetary reward all the time creating your own set-lists to accommodate your next gigs fans, introducing what Harmonix refers to as a “risk versus reward” system into the game, requiring a dedicated thought process behind your decision making somewhat similar to a real life band progressing through their musical career.

One of the decidedly major advantage the Rock Band franchise has over its competitors is its comprehensive track listing and music store. I love the loaded tracks in Rock Band, more so than any offering from Guitar Hero or even the US released Rock Band 2. Classics such as Soundgarden’s “Black Hole Sun” and Stone Temple Pilots “Vaseline” are just the tip of the iceberg of this rock monolith’s 58 playable tracks, 51 of which are master recordings.
The in built music store allows further expansion buy allowing users to download new “track packs” or individual songs at a price of 160 Microsoft Points (US$1.99) per song. Currently there are over 250 tracks available for download from the Rock Band Music Store but it is unclear at this stage if all we be made available upon the Australian release, nor if their pricing will differ.

The Instruments
Guitar/Bass – The Rock Band guitar is by no means an evolutionary step in musical peripherals. In fact its quite the opposite as are all of Rock Band’s instrumental ensemble via their USB tethers. Connectivity aside the guitar unit is modeled against the famous Fender Stratocaster and, in my opinion, a far more recognizable shape of rock guitaring that most are more likely to identify with than that of Guitar Hero III’s Les Paul knock off. Unfortunately for Rock Band that’s pretty much where the praise ends. The guitar feels cumbersome, there’s little to no feedback when it’s fret buttons are depressed and the strum bar feels as though you’re pushing it through a pool of super glue. The familiar “click” when strumming on any of the previous Guitar Hero units is completely absent leaving me unsure as to whether or not I’ve actually played the note at all! It’s of general Internet consensus that the included guitar is rubbish and many are applauding Harmonix for the new upgrade with Rock Band 2 but unfortunately that’s not what Australia’s getting.

Drums – Harmonix received a lot of flack over the supplied drum kit when they first released Rock Band in the US. Complaints of the foot pedal snapping in two were more common than not and they went on record as to saying some of their initial units were admittedly faulty. Providing your foot pedal stays in one piece I can honestly say banging away on the drums is by far the most rewarding, and realistic, experience of Rock Band (for me). They’re loud, and housemates who aren’t joining in will quickly alert you to that fact, don’t think banging away on plastic pads is any less annoying than a real drum kit. You’ll also need to find a brick to put in front of them as the whole set up tends to move forward with each fervid kick of the foot pedal but boy is it a hell of a lot of fun. Be prepared to work a little on the drums too, if you’ve never drummed before teaching your mind to separate your three limbs (you generally only use one leg) to work independently is a challenge and one that’s not quickly mastered.

Microphone – I am most definitely not one for any form of karaoke. I know I can’t sing to save myself and I don’t see how forcing others listen to my hideous pitchless screams can be fun for anyone that isn’t deaf. I’d much prefer to bounce around the lounge room with a plastic guitar than sound like a fool singing! That said, in the spirit of gaming journalism I have (in solidarity) tried “singing” a tune or two. Fortunately as with pretty much every karaoke-like game available Rock Band calculates your performance on the ranging pitches your voice takes and not on you actually singing anything at all. It’s quite simple to get through a song with nothing more than a well controlled hum and whilst that may not be in the spirit of the game it was a most welcome relief for me.

For those tossing up between Rock Band and Guitar Hero World Tour (which is basically Rock Band with different tracks) I have to recommend Rock Band for its track list and music store, but ideally I’d want the hardware from Guitar Hero and the game from Rock Band. Even though this game is over a year old for the majority of the video game world you will find its popularity no shorter than ridiculous in Australia. What’s fantastic about Rock Band is that it has such a wide appeal including those whom want to rock their nights away pretending to be the latest Dave Grohl to that of the karaoke junkie; this game appeals to you all and what’s more you can now play together! Yay! One big happy family!

Related Links:
Rock Band Official Website
Rock Band track list
Downloadable tracks for Rock Band

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Looking forward to PAX 2008

August 21st, 2008 by Raj

Recently I was asked by the lovely ladies of “The Blue Skittle” magazine to offer my reasoning behind exactly why I’m looking forward to this years Penny Arcade Expo (PAX). I’ve pasted my paragraph below but be sure to check out the rest of the issue at http://theblueskittle.com

“My favourite response when people ask me about attending PAX is “I may have had to sell a kidney to afford it but it’s a once in a lifetime opportunity for me to go.” It’s when they ask to see the scar that I have to that I disappoint them and explain that I’m speaking figuratively. In all honesty though, for me, coming from Australia to attend; PAX is one of the remaining Mecca’s for game “consumers” since the retarding of E3 and I’ll be damned if I’d miss it while I’m staying in North America even if I am all the way on the East Coast living in Canada.”

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How to get TVShows (the app) working again

May 14th, 2008 by Raj


For the unfamiliar TVShows is a fantastic (and more importantly free) application that does a wonderful job of monitoring a series of RSS feeds and downloading the latest torrent for your beloved TV shows.

Up until recently TVShows would run in the background checking tvRSS.net for new torrents at a predetermined interval, downloading a new episode’s torrent if there was one to collect. Unfortunately that was until about a month or two ago when all of a sudden it seemed that nothing was being retrieved anymore even though it was sitting there plain as day on tvRSS.net.

Not knowing what was going on, and not having a clue when it comes to Ruby programming I jumped into the SourceForge forum and found that I wasn’t the only one having the problem. It seems (although it’s not confirmed) that tvRSS.net has decided to block the application from connecting to the site and scanning it for new episode information. Fortunately, and full credit goes to the forum here, those wiley geeks have found a way around this and will have you downloading torrents again faster than you can say “sesquipedalian“.

Here’s how you do it…

  1. Open up the main guts of TVShows in your favourite text editor. The file you want is:
    /Users/[your username]/Library/Application\ Support/TVShows/TVShowsScript/TVShows.rb”
  2. At line 172 you’ll see: (this is all on 1 line, just in case your browser has wrapped it)
    rawEpisodes = SimpleRSS.parse(open(FEED % @exactName,”User-Agent”=>”TVShows/#{@preferences[‘PREFS_SCRIPTVERSION’]}”))
    Change this to:
    rawEpisodes = SimpleRSS.parse(open(FEED % @exactName,”User-Agent”=>”Apple-PubSub/65.1″))
  3. Save the file and you’re done. You might have to reboot to restart the daemon but I didn’t.


To give you a quick explanation of what’s actually being changed (as far as I can tell) is that we’re simply telling the tvRSS.net webserver that we’re actually using a Safari RSS reader instead of another application. Simple.

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