GIMP 2.8.0 on Mac OS X
GIMP 2.8.0 has come out and Simone Karin has created packages for Mac OS X.
One major innovation of this version is the single-window mode. You can switch it on as follows:
Windows → Single-Window Mode
Additionally, the Aqua Theme looks much better on OS X than the default:
Edit → Preferences → Theme → Aqua