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I was wondering if upgrading from Lion 10.7.4 to Mountain Lion 10.8 would wipe out all of my dependencies in /etc and others;

I ask because I have quite a few RoR projects each with different gem requirements and I'd hate to lose the delicate ecosystem I've set up, on account of an upgrade :/

Thanks for the pointers!

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I would backup this information. – Ramhound Jul 19 '12 at 17:17
You probably shouldn't upgrade your OS without known good backups in any case, /etc or not... – Daniel Beck Jul 25 '12 at 17:01

I just upgraded to Mountain Lion few days ago and didn't lose my rails project & postgres database. However 3 things didn't work properly anymore — git, homebrew, and imagemagick.

Here's what I did to fix those three:

  1. Install Command Line Tools from the XCode preference menu.
  2. Fixed Homebrew.
  3. Run brew uninstall imagemagick and install it back again with brew install imagemagick.
share|improve this answer
I had to do all three of those as well. X11 is no longer installed by default, so some Homebrew formulas required XQuartz. – user495470 Aug 9 '12 at 13:49

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