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Today I was updating my Mavericks installation and during the process it seems that App Store somehow "hung up" on installation and some downloads didn’t download properly.

Because of that, now I see multiple instances of "OSX Update 10.9.1" in updates history, and not just that, but every other part from that chunk of updates such as iTunes update.

When the download finally "finished" and when I activated it, it said that it was corrupted and it should be downloaded again. I did that, activated it and everything went OK, update is now here.

I’m interested if these types of situations are common and are not something to worry about. From my previous experiences, App Store is kind of wonky so this behavior is not unexpected, but I see this first time and I’m little concerned.

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If you get it working just by redownloading, it's nothing to worry about.

As both a user and developer I can tell that these types of errors aren't uncommon (Often times caused by an unstable internet connection or if the Mac has been on standby for a longer period whereafter the download is continued). But it's decided by multiple factors including your router, signal strength, geographical location and so on.

The problem is that it can be hard to perfectly download every little piece of a large file. Sometimes it's read wrong or written wrong to the disk and this causes corruption and possibly confuses the part of App Store that displays progress and download items.

To Apple's credit, though, they seem to be able to "chunk" download effectively most of the time, where other apps (like Chrome for instance) just kills the download and makes you manually start over. Personally, I rarely have these types of errors anymore (they were much more common in the "early days" of the App Store).

  • I rarely use App Store, it’s like my last resort because personally I like to have control over everything I install on my computer, as opposed to iOS where I actually greatly prefer this type of app management. Glad to know this is completely normal! :) – niksy Dec 25 '13 at 14:56

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