Photoshop: Photoshop CS3, CS4 won't run in Rosetta on OS X Lion (PowerPC Error)

  • 3
  • Problem
  • Updated 8 years ago
  • Solved
  • (Edited)
I just installed OS X Lion this afternoon on my Late 2009 Macbook Pro (17") and have noticed that PS CS4 is no longer working. I keep getting this error message:

"You can't open the application Adobe Photoshop CS4 because PowerPC applications are no longer supported."

Prior to upgrading I was running PS CS4 in Rosetta and PS CS5 in normal mode. LR3 is still functional as is PS CS5. I've re-installed without uninstalling the old version. Then I uninstalled then I re-installed fresh all to no avail. Any suggestions
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Hunter Rudd

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Posted 8 years ago

  • 3
Photo of Jeffrey Tranberry

Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Official Response
Apple no longer includes Rosetta with OS X Lion, so anything that relies on PPC emulation (old drivers, plug-ins, etc or running CS3, or CS4 in Rosetta to access those drivers/plug-ins) won't work. The options are, stick with Snow Leopard, or update the software/drivers, etc so that they can run natively on OS X 10.6.7 (Lion).

In addition, Photoshop CS2 or earlier will not run at all on OS X 10.6.7 (Lion). I'd suggest users of CS2 upgrade to CS5 sooner than later to take advantage of upgrade pricing. Users must be within 3 versions back (CS2, CS3, CS4) to get the upgrade price.
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David Dobish, Photoshop Engineering Manager

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Official Response
Script to remove rosetta pref can now be found here.