I have an unopened, sealed CS2 but the box says that it runs on OSX 10.2-10.4. I don't want to open it if it won't run on my OSX 10.8.2. Is there an upgrade that will permit me to use the application?
CS2 was PPC, OSX 10.8 is Intel. Apple's Rosetta which allowed PPC apps to run on Mac Intel machines was discontinued in versions 10.7 and 10.8, so aside from upgrading I don't believe its possible with that configuration. However CS2 is now outside the upgrade path options, so sadly I think you will need a full version. http://www.adobe.com/products/creativesuite/upgradeinfo.html