Installing Fox on MacOS X
To install F.O.X. under Mac OS X, you can download the disk image from SourceForge. On the download page you can also get the pdf documentation, which is a print-ready copy of the online wiki. Fox is currently distributed as a Universal Binary, so it should run on both ppc and x86 macs.
Click on the appropriate package and the download will begin (you can select an alternative download server if the first one is too slow). Once the download (~8 Mb) is complete, open the .dmg file in finder (done automatically in Safari) and you will see the Fox application and the examples folder. I suggest creating a folder in someplace convenient and memorable (like FOX2005-11-11) and drag the contents to that folder.
Fox can be run from that location or can be dragged to the dock, etc.