Don't bother buying Photoshop CS6 for your 32-bit Mac
Look, how many bits you choose to process in the privacy of your own home is entirely your business, but don't expect the latest Photoshop to work on anything less than a 64-bit multi-core Mac running a minimum of Snow Leopard. Adobe's update brings a compute-heavy 'Mercury Graphics Engine' as well as better 3D and video manipulation, with the sacrifice of 32-bit support unless you're running Windows -- although even then certain features will be limited. The message is clear: jump on the upgrade treadmill or sacrifice 65 user-feedback-inspired features and a new crop tool.