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FileMerge/opendiff used to work fine for me when i was on Lion. After upgrading to Mountain Lion, FileMerge always says 'unable to save file'.

Anyone else having the same problem? Any solutions?

[UPDATE]: I just updated to 10.8.2 and the issue is gone.

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closed as unclear what you're asking by Mark, Matthieu Riegler, drfrogsplat, M K, Graham Miln Feb 11 at 7:42

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1 Answer 1

Running this in terminal should fix it

sudo /usr/bin/xcode-select -switch /Applications/Xcode.app/Contents/Developer
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protected by Community Sep 17 '12 at 19:32

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