to manually uninstall Pro Tools, drag the following files/folders to the trash:

*note, if you don't find some of the files listed here, don't worry about it too much. Just do the best you can as this list may be more extensive than what is actually on your system at this moment.

Mac HD>Applications>Digidesign Folder
Mac HD>Library>Application Support>Digidesign Folder
Mac HD>Library>Audio>Digidesign CoreAudio.plugin
Mac HD>Library>Audio>MIDI Drivers>DigiDioMidiDriver.plugin
Mac HD>Library>CFMSupport>DigiCFMShim
Mac HD>System>Library>Extensions>Digidal.kext
Mac HD>System>Library>Extensions>DigiIO.kext
Mac HD>System>Library>Extensions>Digidesign FireWireAudio.kext
Mac HD>System>Library>Extensions>DigidesignMbox2.kext
Mac HD>System>Library>Extensions>DigidesignMbox2Boot.kext
Mac HD>Library>Frameworks>DAE.framework
Mac HD>Library>Frameworks>DHS.framework
Mac HD>Library>Frameworks>DigidesignFWDriver.framework
Mac HD>Library>Frameworks>DigidesignUSBDriver.framework
Mac HD>Library>Frameworks>DigiMachOServices.framework
Mac HD>Library>Frameworks>DigiPlatformSupport.framework
Mac HD>Library>Frameworks>DigiPlugInHelper.framework
Mac HD>Library>Frameworks>DirectIO.framework
Mac HD>Library>Frameworks>DSI.framework
Mac HD>Library>Frameworks>DSPManager.framework
Mac HD>Library>Frameworks>DUI.framework
Mac HD>Users>User Folder (house icon)>Library>Preferences>DAE Prefs folder
Mac HD>Users>User Folder (house icon)>Library>Preferences>Digisetup.OSX
Mac HD>Users>User Folder (house icon)>Library>Preferences>Pro Tools LE preference file