I can't open Photoshop CS5 and CS6 versions simultaneously. When I launch CS6, and then CS5, it takes me to CS6, and vice versa.
Is it possible to keep open the two versions? With Indesign I can do it.
As far as I know that is normal behavior: only one instance of Photoshop at a time. Forum members have reported running two versions of Photoshop simultaneously using virtual machines on their computer (which emulate separate computers).
Believe it can be done on a Mac.
And only on a Mac. On a PC acresofgreen is exactly right. Only one can be open at a time.