Group: V 2.48a release
I am having problems getting Python messages and general Blender messages to show in console.app on Mac OS X 10.5.5.
A workaround is to deliberately generate some Python errors. It seems to me that Blender is being conservative with dumping output to the log file. This probably helps performance, but makes it very difficult to debug scripts, both regular Blender scripts and from the game engine.
I'm not sure if there's a setting somewhere in Blender or the console, or an alternative IO stream to log to, but I've been unable to find it after extensive searching.
The attached .blend shows the behaviour on my machine. Instructions included.
Blender 2.48a / OS X 10.5.5 / intel Core 2 Duo 2.5 / 2GB RAM / Geforce 8600M GT.