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Is there any way to download and store app bought from the Mac App Store in an external hard drive and also being able to update them? (I'm especially interested in doing this with Xcode)

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Mac App Store or iOS App Store? –  Daniel Lawson Jan 21 '12 at 14:06
    
I'm talking about the Mac App Store. –  Federico D'Ambrosio Jan 22 '12 at 18:21

2 Answers 2

You've asked two separate questions, so I'll answer them separately:

Is there any way to download and store app bought from the App Store in an external hard drive

Yes.

In the case of Xcode (and Lion), what you are downloading is an installer.

If you run the installer from /Applications/ then it is deleted after it finishes installing.

If you want to keep it, move it somewhere else after it finishes downloading (before it finishes downloading it won't appear in /Applications/ anyway) and before it finishes installing.

and also being able to update them?

No. Apple does not (yet?) support "delta" updates, so when the next version is released, you will have to download the entire thing.

The only purpose for saving the downloads would be if you had another computer you wanted to update, or if you wanted to save it for a potential reinstallation before it is updated.

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Thanks. But how can I get notified if there's a new version? Just by leaving there the installer even if I install it elsewhere? –  Federico D'Ambrosio Jan 22 '12 at 18:22

I guess one way is to create a new iTunes library in the external hard drive, and sync you iOS devices with this new library. Option-Click the iTunes icon to lunch the iTunes will give your options to create new library or choose a library location.

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It sounds from the post like the OP is looking for a way to buy from the Mac App Store, not the iOS App store, but I'll ask to be sure. –  Daniel Lawson Jan 21 '12 at 14:06

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