Can't install Acrobat PRO in CC using CS6 (mac)

Hi Community,

In my Company we plan to upgrade to adobe CC (2014) on macs.

In the first step we try to use CC and CS6 together on some macs to ensure it's working.

But since the installation of CC Acrobat PRO X (from CS6) asks for the licence key again when starting.

Unfortunaltly the problem still exists after reinstalling the CS6 package.

In the CC i have no option to install Acrobat PRO XI.

From the Adobe support I've got the hint to delete a file called opm.db in users/Library-folder but this did not help.

Does anyone know how I can fix this?

thanks