GNOME Bugzilla – Bug 692889
GIMP won't install on OSX due to Gatekeeper security settings
Last modified: 2013-01-30 18:12:16 UTC
In OSX 10.8.2 and later, only applications from identified developers or the Mac App Store can be installed with the default security settings in Gatekeeper, which removes GIMP from the OSX environment. Basically, one only has to be a member of the Developer program and request and Developer ID Certificate. for more information, see: https://developer.apple.com/library/mac/#documentation/ToolsLanguages/Conceptual/OSXWorkflowGuide/DistributingApplicationsOutside/DistributingApplicationsOutside.html
Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find. *** This bug has been marked as a duplicate of bug 683019 ***