> Only if plugged into the USB port in the iMac which means 2 ports for 2 > keyboards are required. If daisy-chained on the keyboard ports, the message > is The USB drive "unknown drive" cannot operate because it requires more > power than available.....and they're right. > >>2. Now do the same with three keyboards and three mice. > > No iMac ports remain. So, If I wanted to do this in anger, I'd have to get a USB hub, right ? Phil.