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I'm on Lion and am learning Android development. I have Eclipse Indigo Service Release 1 version and the lastest SDK installed.

If I upgrade to Mountain Lion does it mean I have reinstall the SDK?

I have folders in the root Macintosh HD such as android-sdk-macosx, are these deleted?

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up vote 5 down vote accepted

No, nothing is deleted when updating. A common sense would be to back-up everything as things can go wrong, but if everything go right, nothing is deleted! Even opened apps are reopened after update.

It must be noted though that the first time you launch Eclipse, OS X will tell you that it will install Java first, as Java is not installed by default anymore.

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I use Time Machine so all my files are backed up right? If something does go wrong I can just restore it? –  orange Jul 26 '12 at 15:35
    
yes, you're pretty much all set. Just go ahead. I updated 2 machine and had absolutely no problem. I'm using both XCode and Eclipse for iOS and Android dev and nothing disappeared when updated! –  Philippe Gilbert Jul 26 '12 at 15:40

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