If you already have Pro Tools TDM 6.9.2 or higher or Pro Tools LE 6.9.2 or higher installed on your system, you should not use the Standalone Digidesign CoreAudio Driver installer. Now Available - Standalone Digidesign CoreAudio Driver Version 7.0
Standalone core audio driver download for mac os x#
Digidesign CoreAudio Driver for Mac OS X 10.4 (Tiger)