I have a Snow Leopard DVD that was copied from the original. All it says on the CD is "Snow Leopard" How can I tell what version of the DVD it is? The DVDs were only released in versions 10.6.0 and 10.6.3.
You should be able to see the OS version by going to System Preferences > Startup Disk. If it doesn't show in Startup Disk for some reason, you can run the following command in Terminal:
defaults read "/Volumes/Mac OS X Install DVD/System/Library/CoreServices/SystemVersion" ProductVersion
If your DVD is not called "Mac OS X Install DVD" then you'll need to replace that part of the command with the actual disc name.