Hey folks, I'm trying to solve some bad sound issues in my rehearsal space and was wondering if anyone could recommend some Mac software to analyze my room. Perhaps there's even shareware out there? Thanks.

Spectra FooX from Metric Halo
Can't live without it !

http://www.mhlabs.com/metric_halo/products/foo/

Also there is now for Mac SMAART 6 , not as good as SFX but you'll have a 30 day demo :

http://www.eaw.com/products/software/EAWSmaart/download.html

Both are very serious analyser softwares.