On each Mac you want to back up to the external drive on your target Mac: (Apple says in a 2016 support document that SMB isn’t supported, but in a 2017 one covering Sierra, it says SMB is.) Click the Options button to make sure that AFP is enabled. Open the Sharing system preference pane, and make sure File Sharing is checked. Next, you need to make sure this Mac has file sharing enabled. Mount the Time Machine volume in the Finder. Now, set up Time Machine to use this external drive. I wrote a column earlier this year that explains the formatting issues for local and networked volumes.
Second, make sure your external volume has been formatted ideally for Time Machine. Wi-Fi will work, but the amount of backup data passing over even the latest, fastest Wi-Fi flavor may bog down other simultaneous network activity.Įven if only your Time Machine destination Mac connects to a base station via ethernet, that still halves the amount of backup data that passes over Wi-Fi-it’s transmitted from a Mac to the base station over Wi-Fi, and then from the base station via ethernet to the destination Mac.
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Here’s how to do that.įirst, Attach the hard drive to the Mac you want to act as the Time Machine “hub.” This should be a desktop machine and, preferably, one that’s connected via ethernet to your home network. Ed Bernard has all the right pieces, but wasn’t able to find a straightforward explanation for backing up his three Macs to a single external drive that he’s attached to one of them.
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