A:
Yes, I have used mine for three macs. You might want to set up a folder for each, but time machine will separate them, but you must download the software for the unit to each mac, with your macs, should be a walk in the park, using timemachine (((Or, as I did with my older G5 tower, you can transfer files via ethernet cable or wi-fi (use help function if you're not sure how) or through your router (I connected mine thru my router using the isp connection in network settings),))))