I'm a brand new Mac user, after switching from PC where I've worked for the last 12 years or so. When I run Photoshop I'm finding the performance very disapointing - switching/resizing brushes is laggy, eye dropper is slow, and even when painting I can hear the machine grinding away trying to keep up. This is not at all what I expected. Swapping between brush and eye dropper (something I do about 1000 times a day) gives me a half second lag, which is unacceptable. I'm running a MacPro 3 GHz Dual-Core, 4 GB RAM, with the ATI RadeonX video card. I might be inclinded to blame it on Adobe, yet these very typical operations are handled instantaneously on my 3 year old 1 GHz Dell - I can swap brush with dropper just as fast as I can hit the keys. 1. Is this typical performance for a Mac? 2. Is there something I need to set up differently than 'out of the box' for adequate performance? Any tips would be great; I'm really puzzled here. Thanks.