I upgraded our iMAC to Yosemite as the machine had a lot of issues with speed and programs crashing and no other fixes tried seemed to help. The machine is now running like a dream but Quark 10 (which I also upgraded as 9 didn't work with Yosemite) will only open as the Admin account and will not run as the users account.
I deleted her account and setup a new one and this still did not help.
Our MAC Expert has looked at this and is completely baffled by this and has not been able to work out a fix.
Please can someone help!!