I followed FoswikiOnMacOSXLeopard to install on Snow Leopard, but I needed to install the XCode.pkg tools which are located on the Snow Leopard install DVD to get the RCS and other tools that were missing.
Unfortunately I'm new to Foswiki so understanding what I should test to see if it is really working well or not is unclear. At least, there are no errors in the config section.
-- RickCogley - 05 Sep 2009
Update: I switched the installer package FoswikiOnMacOSXLeopard to RcsLite so RCS binaries are not required anymore in order to run Foswiki.
-- MatthiasWientapper - 09 Dec 2009