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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  • rs2 - Wednesday, July 20, 2011 - link

    Okay, it makes sense on a touch device where your finger is actually making contact with the thing you are scrolling. But a mouse cursor is *not* a finger. It is not an analog for a finger. It is a different input paradigm entirely, and trying to make it behave as if the mouse cursor is your finger by making scrolling go backwards is stupid.

    It's good that they put in an option to disable the nonsense that is "natural" scrolling.
  • name99 - Thursday, July 21, 2011 - link

    Not at all. The issue is simple : what is the metaphor?
    When I move my finger, am I moving
    - the window container? OR
    - the content?

    Claiming that one is more "natural" than the other is as stupid as claiming that English is more natural than Chinese. It's simply that you are used to one and, like a good American, you simply cannot imagine that the world could possibly be different --- after all, Jesus spoke English.
  • rs2 - Thursday, July 21, 2011 - link

    Not at all. There is no "finger" when using a mouse. Touch and mouse-driven are distinct input paradigms. If a touch-based interface ever scrolled content in the opposite direction that the user moved their finger, then people would say that it was broken. And rightly so. Moving content in the same direction as the touch is the intuitive operating mode of a touch interface.

    And similarly, moving content in the opposite direction of the scroll (or more accurately, moving the scrollbar in the same direction of the scroll) is the intuitive operating mode for a mouse-driven interface. By your logic scrollbars themselves should also be inverted.

    As a side-note, a direct analog to touch style scrolling does exist in the mouse-driven paradigm, it is the drag operation. It is available in some things like Adobe PDF documents, and also work on any scrollbar. In this operation you choose an anchor-point, and then that anchor point moves in the same direction that you move, and it all makes sense. The problem with scrolling is that it has no anchor point, it is a distinct operation from a drag operation, and by conflating the two Apple has broken their interface. At least until they start incorporating touch into every computer they sell.

    Mouse-driven and touch interfaces are not the same thing, and just because a metaphor makes sense in one does not mean that it also makes sense in the other.
  • Uritziel - Friday, July 22, 2011 - link

    Agreed.
  • CharonPDX - Wednesday, July 20, 2011 - link

    On page 23 "Performance: Similar to Snow Leopard", you have a couple bar graphs comparing Snow Leopard to Lion performance. Unfortunately, you use a generic "compared to before as 1.0" metric, with no indication on a per-test basis whether higher or lower is better. In the Core 2 Duo graph, you talk about boot time skyrocketing, and the boot time graph for Lion shows Lion as "about 1.4" of Snow Leopard, yet you also talk about iPhoto having a "greater than 10% increase in performance", where the graph shows "about 1.1" of Snow Leopard. So in one line in the graph, higher is worse, in the other line, higher is better.

    You either need a per-test identifier (Higher is better / Lower is better) or you need to to standardize them all (so 'benchmark' ones would stand as-is, while 'timing' ones would use the inverse, so that both would be 'higher is better', or example.)
  • Deaffy - Thursday, July 21, 2011 - link

    Did anyone check to see whether Apple has included a UI element to enable IPv6 privacy extensions for statelest address autoconfiguration?
    And did DHCPv6 to get IPv6 addresses from your ISP's cable via IPv6 finally make it's entry?
  • Deaffy - Thursday, July 21, 2011 - link

    Oh yeah, and maybe the ability to query a name server via IPv6?
  • kevith - Thursday, July 21, 2011 - link

    they are more and more returning to the Linux it came from. Who knows, they might even go bact to open source:-)
  • Omid.M - Thursday, July 21, 2011 - link

    Anand/Andrew/Christian,

    If you right click on a YouTube video, does it say the rendering AND decoding is "accelerated" ? I thought Lion was supposed to bring that.

    If this is now the case, it'd be enough reason for me to buy Lion and a new MBP 15". I can't stand the fans on my 2008 MBP 15 going nuts every time I watch a 30 second YouTube clip. The laptop gets unreasonably hot right now.

    @moids

    P.S. I'm not a fan of the way buttons appear on the upper borders of windows. There's no typical button "design" to signify that the text is clickable, at least not from the screen shots I saw in the article.
  • Omid.M - Thursday, July 21, 2011 - link

    I guess it's disabled:

    http://www.macrumors.com/2011/07/21/adobe-suggests...

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