In a managed account + AD environment here, I'm having the same problem.
From what I can work out, it appears to be dbus-launch causing the problem.
PER-MB003:bin acb$ /Applications/Gimp.app/Contents/Resources/bin/dbus-launch
Could not get password database information for UID of current process: Failed to get groups for username "acb" primary GID 749857189: Unknown error: 0
Failed to start message bus: Memory allocation failure in message bus
EOF in dbus-launch reading address from bus daemon
Editing /Applications/Gimp.app/Contents/Resources/bin/gimp (a shell script) to remove 'dbus-launch' from the startup process makes this work. It's certainly not a "good" solution, but either way, Gimp now starts for me.
I happen to be a member of 19 groups in the AD here, somebody here mentioned that it may be failing as it's > 16.
If this helps, great, if not, meh
From what I can work out, it appears to be dbus-launch causing the problem.
PER-MB003:bin acb$ /Applications/Gimp.app/Contents/Resources/bin/dbus-launch
Could not get password database information for UID of current process: Failed to get groups for username "acb" primary GID 749857189: Unknown error: 0
Failed to start message bus: Memory allocation failure in message bus
EOF in dbus-launch reading address from bus daemon
Editing /Applications/Gimp.app/Contents/Resources/bin/gimp (a shell script) to remove 'dbus-launch' from the startup process makes this work. It's certainly not a "good" solution, but either way, Gimp now starts for me.
I happen to be a member of 19 groups in the AD here, somebody here mentioned that it may be failing as it's > 16.
If this helps, great, if not, meh