I upgraded to Yosemite and my Photoshop CS4 stopped working. The message was that the license need to be updated. What is the solution
I've seen this one so many times
It means the upgrade broke the install.
Reinstall CS4. If you don't have the discs, download the installer.
Download CS4 products
(If anyone's answer does solve your issue, please mark it "correct" to close the case.)
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