Re: I'm running OS10.6.8 on an "old" Macbook Pro with Intel Core Duo 32. My work computer is down and I need to use Photoshop and cannot find a version that will run on here! It lets me use Illustrator 10, Indesign CS6, but Photoshop 4, 5, 5.5 and I can't

Your macbook pro has a 32 bit processor and not a 64 bit processor?

If so, i believe photoshop cs5 is the newest photoshop version that will work on your Macbook Pro.

System requirements | Photoshop

You can get a 30 day trial trial version of photoshop cs5 from here:

http://helpx.adobe.com/creative-suite/kb/cs5-product-downloads.html