I tried to install a 30 days trial version of CS5.5 Design Standard at a MAC OS X 10.6.8 with enought free space and no Adobe products inside, and this messege apears:
"Installation on units that distinguish between uppercase and lowercase is not supported. Choose a different drive location to install."
Does anybody knows especifically what's this means? I have no idea...
It means you currently have your drive formated in a case sensative file format. For additional details please see Error "Case-sensitive drives not supported" or similar install error | Mac OS - http://helpx.adobe.com/creative-suite/kb/error-case-sensitive-drives-s upported.html.