Hello Lion,
I just downloaded and installed the ObsPy.dmg (a few minutes to download, ~20 seconds to install), and ran a couple of the tests and one of the obspy tutorial programs. All went perfectly! Bravo!
I am on an iMac :
System Version: Mac OS X 10.6.8 (10K549)
Kernel Version: Darwin 10.8.0
I have not yet tried the virtual environment setup, I will look at this is the near future.
Thanks very much - I think that the addition of this OSX application is extremely valuable for the obypy community and the future of obspy.
Ciao,
Anthony