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I have Adobe Creative Suite 4 running on OS 10.5.8.

If I upgrade to 10.6.6 will CS4 programs still work?

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up vote 1 down vote accepted

Yes, I have it running on Lion ( 10.7.2 )

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Photoshop CS4 is running fine for me under OS X 10.6.8.

NOTE, for switching the OS it is safest to go into the Help menu to deactivate Photoshop, then activate again the first time you use it after switching.

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Safest, meaning what? Does this have to do with the software licensing? (I don't have CS4; just curious what this really means.) – bneely Feb 14 '12 at 0:16
You are allowed two (I think) copies installed at a time. Uninstall one to install another. But under some circumstances (I don't know the details) the new OS may be seen as a new installation. – GEdgar Feb 14 '12 at 1:32

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