With thanks to Jamie Kimberley, this site should now have a steady stream of Mac development builds.

It has all the features that are listed in the Windows build that was done on 2010-06-06.
Based on commit: 06e44b8d4760181e7bee

On Mac OS X, when the download finishes, Mac OS X should automatically open the .dmg file for you. If not, double-click to open it. Drag the GoldenCheetah icon into your Applications folder, and you’re done.

Download the Intel version here: GoldenCheetah-Intel.dmg (~38M)
Download the Power PC version here: GoldenCheetah-PPC.dmg (~40M)