The downloaded bundle for OSX, fails to start. When using the experimental front end, nothing happens; but when double click on the ioquake3 bundle the game does not start, after flashing the screen (probably trying different modesets).
The attachment contains the ioquake log when launched from the command line. The system is a 24-inch iMac (the first generation in alluminium with black screen border) running OSX 10.5.7.
Created attachment 2092 [details] The log when run from a terminal