We bet there are still many Adobe Creative Suite 3 (CS3) users running Mac OS X 10.5. The bad news is Adobe CS3 and earlier version have not been tested to run on Snow Leopard. Adobe is asking CS3 users to upgrade to the latest CS4 (retail at $699.99) if they want to run the new Snow Leopard operating system which Apple is releasing tomorrow.
John Nack, principal product manager for Photoshop at Adobe, wrote on [his official Adobe blog](http://blogs.adobe.com/jnack/2009/08/adobe_snow_leopard_faq.html) announcing the availability of Adobe document on Adobe Creative Suite and Mac OS X Snow Leopard compatibility:
Apple and Adobe have worked closely together (as always with new OS releases) to test compatibility. As for CS4, everything is good with the exception of auto-updates to Flash panels (which I guarantee you’re not using*) and Adobe Drive/Version Cue (which doesn’t work at the moment on 10.6). CS3 & earlier haven’t been tested. Please see the FAQ for additional info.
Adobe CS4 apparently does not require any product upgrade to run on Snow Leopard. But for older version of Adobe Create Suite such as CS3 or Macromedia Studio 8, Adobe has this to say:
Older versions of Adobe creative software were not included in our testing efforts. While older Adobe and Macromedia applications may install and run on Mac OS X Snow Leopard (v10.6), they were designed, tested, and released to the public several years before this new operating system became available. You may therefore experience a variety of installation, stability, and reliability issues for which there is no resolution. Older versions of our creative software will not be updated to support Mac OS X Snow Leopard (v10.6).
Read the [Adobe Creative Suite 4 Solutions and Mac OS X Snow Leopard FAQs PDF](http://blogs.adobe.com/jnack/files/Adobe-SnowLeopard_FAQ.pdf) document for details.