http://www.digidesign.com/index.cfm?langid=31&navid=54&itemid=22904
上pt的网上看一下就知道了
Mac OS X 10.5 (Leopard) Currently Not Compatible
Pro Tools software and hardware are currently not compatible with the Mac OS X 10.5 (Leopard) operating system, including all versions of Pro Tools 7.4. For the latest information, check the announcement in the News section regarding upcoming support: