Is AirDisk officially supported as a Time Machine backup? I had assumed it was (it just worked when I was setting things up) but I stumbled on a post on another website saying it wasn't supported by Apple. I did a search on the forums here and, as best as I can tell, using recent hardware with all of the appropriate updates, it "should" work. However, given that it is my backup, I am not comfortable with "should". My specific setup is a base mid-2011 21.5" iMac, running Mountain Lion, connected via ethernet to an Airport Extreme base station (5th gen). Connected to the Airport Extreme's USB port is a 1TB Seagate Backup Plus portable drive that has been formatted HFS+ Journaled. Previously I was using a Western Digital MyBook 640GB external USB2.0 hard drive connected to my iMac. It died (after only 2 years) and I replaced it with the portable Seagate listed above. I could always connect the portable drive directly to the iMac but (1) it would use my last open USB port and I would prefer not to clutter my desk with a hub and (2) the router is in another room and therefore so is the external hard drive which means it is not cluttering up my work area. Yes, I have issues with clutter. Thanks.