I verified permissions on the Mac disk (but couldn't see this option on my ext HDD with library and music on it).
Message is "Ableton Live Suite wants to make changes - type password to allow this - doesn't matter if I do or click cancel, Live starts up ok.
This doesn't happen with Suite 8 (both are 64bit). EDIT: Yes it does - both 8 & 9
I'd be grateful for any advice.