I'm getting this error when trying to install photoshop:
You can't open the application "Adobe Photoshop CS6" because it's not supported on this type of Mac.
I've got a IMac duoCor 10.6.8...does this mean I need to buy a new Mac?
Possibly, here are the system requirements
You might not meet the first one there with some older processors.
This link might help:
If its the Core Duo processor it is only 32-bit