Apple introduced the Mac App Store (MAS) in its Back To The Mac event last October. It was released to public on January 6th and was automatically included in the 10.6.6 update. It’s obvious that the MAS is a spinoff of Apple’s extremely popular iOS App Store. While the MAS has been available for over six months now, Lion will bring some healthy improvements.

First, there will be support for in-app purchases. Since Apple does not allow trials, this is mainly useful for applications that can have additional commercial features or are subscription based.

Second, developers can now send push notifications to alert users. As in iOS, the usefulness of this feature varies from app to app, but the presence of third-party plugins like Growl speaks to the demand for this sort of thing.

Third, app updates are now just patches instead of full copies of the app. Apple refers to these as "delta updates," which is the traditional development term for an update delivered by replacing only the changed files/bytes in a application. In Snow Leopard and in iOS, you had to re-download the whole application to update it. That was very inefficient, especially if you were updating a bigger app. After iOS 5 comes out this fall, both it and OS X will feature app updates via patches, just like most other programs have been doing forever.

On a technical note, the structure of OS X application bundles makes them fairly well suited to these kinds of updates. But it's not clear at this time whether Apple is replacing whole files or doing binary patching to minimize the update size. Valve’s Steam service recently transitioned from doing file replacement to binary patching for this very reason, as games typically use a handful of large archives to store their content. For regular applications the difference is subtle, but the difference will have an impact on games distributed through the MAS.

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  • steven75 - Friday, July 22, 2011 - link

    "The fact is Windows/Office is really only expensive if you are building your own computers and installing your own OS"

    You seem to be implying that Office comes free with a pre-built computer when it in fact doesn't ever.
  • anactoraaron - Sunday, July 24, 2011 - link

    wrong. I know I shouldn't feed the trolls but when office 2010 came out my local office depot (and likely every office depot) had at least one pc with the full version of office 2010 on it. It was some kind of promotion they ran for about 2 weeks.
  • tipoo - Wednesday, July 20, 2011 - link

    Apart from the new animations in Safari, is performance improved any? Any word of it getting GPU acceleration?
  • name99 - Thursday, July 21, 2011 - link

    My experience was that it ran the IE Paintball demo 25% faster, and the end result showed no visual artifacts. So, an improvement on 5.0, but still nothing like the HW acceleration performance of IE.

    On the other hand, I've yet to encounter a site (apart from the IE demos) where this actually matters...
  • name99 - Thursday, July 21, 2011 - link

    Oh, it also, if you care, has elementary support for MathML. To be honest, however, the support is REALLY limited. The typography looks like crap, and anything even slightly fancy looks even worse --- eg long bars over symbols, large surds, etc.
  • tipoo - Friday, July 22, 2011 - link

    Thanks. Yeah, its GPU acceleration doesn't seem as expansive still as other browsers, judging by canned benchmarks I've run it through. IE9 and FF5 are still far ahead in GPU acceleration, Chrome and Opera are getting there, Safari 5.1 is still last.
  • EnzoFX - Wednesday, July 20, 2011 - link

    I think it's pretty unfair to compare Windows full-screening to Lion's. Full screening in Windows is not a feature at all IMO, it is the equivalent of dragging the window size out to the size of the screen. You do not gain any functionality whatsoever (usually just a lot of empty space, which was never in Apple's radar before). This kind of full-screen functionality has been present in OS X long before Lion, though it was often more manual, having to drag the window size out.

    But as you say, Apple has added functionality and it's become it's own separate feature. I think the comparison is pointless.
  • SmCaudata - Wednesday, July 20, 2011 - link

    True full-screen in Windows only happens with games, certain video players, and select other apps. I personally so no use for full-screen for most computer applications.

    Also, the comparison is valid because even in those areas where Windows does use full-screen, the other display still works. I can have a full-screen movie on one monitor while I do whatever I want on the other.

    I really fail to see how Apple's implementation has "added functionality" that didn't exist in other OSes before. The article talks about using gestures instead of minimization... isn't that what Alt+Tab and Win+tab already did?

    There are certain things that Apple does do well. Their dock was something that MS obviously took inspiration from for W7. This implementation of full-screen seemed pretty limited IMO.
  • name99 - Thursday, July 21, 2011 - link

    I suspect that the multi-screen hiccups with full-screen are purely temporary.
    We have seen problems like this before --- for example when multi-user GUI support (the rotating cube thing, to allow new users to log in to a mac) was first added, it didn't take long to discover that various iLife apps didn't behave properly. (I forget the details, but I think both iTunes and iPhoto wouldn't launch for the new user.)

    It's one of the drawbacks of Apple being so secretive, even internally, that you get these sorts of crossed signals. But the issues usually get fixed, and if they are very visible, they usually get fixed soon.

    I'd say, right now, the appropriate response is to assume this is a screwup, not go into conspiracy theory mode about how this is a plot by Apple to eventually remove multi-screen support.
  • Uritziel - Friday, July 22, 2011 - link

    LOL. As if a company spearheading Thunderbolt would aim to remove multi-screen support.

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