Yes, it's possible!! Most of the 'solutions' I've seen so far involve a lot of faffing around connecting disks directly, doing all sorts of heroics in the terminal and finally doing a back-up... which (from what I've read) still isn't guaranteed to work. Getting a bit miffed about it all, and thinking I'd have to sell my NAS and get something that would operate under AFP & HFS+, I stumbled across this gem: Fire up terminal, and enter: Code: defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1 I found it at this blog site: http://www.freakymousemats.com/blog/posts/2007/11/01/time-machine-over-smb/ All it requires is the one command line above, and for you initially connect to the drive / share in the finder before you assign it in Time Machine, (otherwise it won't appear in the list of available drives) and that you've saved the user and password you need to connect to it in the keychain. It auto mounts the drive when it needs to afterwards. I've got this set up, and after the initial multi hour back-up (copying 54Gb over even 100mb takes a looong time!), it's completed a couple of scheduled hourly back-ups whilst I was down stairs watching men cock about in crap cars in Africa followed by men cocking about on decent bikes in Europe & Africa. I've now just confirmed that the back ups have been successful by deleting a few files, going into time machine (which is just plain old fashioned showing off in the UI dept ) and restoring the files. That's saved me some dosh!