On Aug 13, 2008, at 11:23 AM, Rod Buchanan wrote: > "About this Mac" on my Son's 2.4GHz 20" iMac says it is 32-bit color. > Whether that is true or not I don't know. That speaks to what the iMac's internals are capable of sending TO the screen. If you're a photographer or artist, or if you have another rig which does truly show millions of colors, you prbly can tell readily whether that iMac does or not..