Well, I just installed 8 GB of additional RAM in my new mac pro, bringing my total to 10 GB. The System Profiler shows all 10 GB being there... but when I go into Photoshop/Preferences/Performance to up the usage of RAM, it only shows 3072 MB of "Available RAM". Shouldn't Photoshop see at least 7000 or 8000 MB of available RAM? I did quit and restart Photoshop and it made no difference, still just says "3072 MB of available RAM".... can anyone help me figure this out? I love this MacPro! Thank you.