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kingsapo

macrumors member
Original poster
Jun 10, 2010
58
4
Hey guys, so I've been trying to get remote backup going. My current setup has an Airport Extreme with a properly formatted USB drive plugged into the USB port. In the most recent version of Airport Utility, I have also enabled Back to my Mac through iCloud, and enabled the disk to be shared over WAN. While I was on the local network, I browsed to the Airport Extreme through finder, and mounted the disk. Then, in System Preferences, I selected that disk as a backup destination. All is well when this operates on the local network.

The trouble comes when I try to backup over a different network. While on a different network, my Airport Extreme shows up on the Shared section of Finder, which I'd expect, since I signed into iCloud on the Airport Extreme. I also see the time machine disk on there, and am able to mount it, and even see my backup image. When I tell Time Machine to begin backing up, however, it tells me the backup disk can not be found, even when I manually mount it.

So my question is, why isn't this working? I have all the pieces set up correctly, and am even able to see inside the disk over a different network. Is this some limitation built into Time Machine that I don't know about? I have tried setting the TMShowUnsupportedNetworkVolumes property to 1 in Terminal, but it doesn't help. The part that really gets me is that it doesn't work even when I manually mount the disk. If it helps, it doesn't look like Time Machine is making an attempt to connect to the volume; it almost instantly tells me that the disk is unavailable. Thank you for any input you can give!
 
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