Pro Audio Support

Q:
Pro Tools 8 Compatibility Alert. Mac OS 10.5 Leopard.
 
A:
Please note that Pro Tools HD, LE and M-Powered 8 are qualified to run on Mac OS 10.5.5 and OS 10.5.6

As documented by Digidesign in getting started guides and user guides, disable Apple's "Software Update" System Preference to avoid accidentally updating your system out of compatiblity.

For more information on ProTools compatiblity, visit
http://www.digidesign.com/compato/