Hi,
I packaged Kiv's poclbm guiminer into a bundled standalone Mac OS X Binary (app) using py2app and some funky voodoo patching action.
You can get it from here: https://github.com/downloads/pletoss/poclbm/guiminer-poclbm-macosx.dmg and give it a try. I hope this works for everybody.
It's important to drag it out of the dmg to some place where it is writable before running since it needs to be able to write some log files in the app. Dragging it to Applications as usual should work.
If you're interested in the voodoo: https://github.com/pletoss/poclbm.
Cheers,
Pletoss