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Yes but you’ll have to reformat it. Choose GUID Partition Format and then you can make it bootable.
Sorry, there was a problem. Please try again later.Although I don't use it for this purpose (I back up video and audio projects), I don't see any reason why it wouldn't work as a fully bootable backup drive for Mac. I only use Macs, and the issue is, in my experience, more with the software you use to backup, rather than the hard drive. However, I always first erase and format my new ext hd with Disk Utility in my mac, then I use Carbon Copy Cloner to create a bootable copy of my mac hd. Time Machine is fine, but does not directly create a bootable copy. It does, however, create a hidden copy of the Recovery hd installed on your mac. So if you have a massive failure, do this: https://discussions.apple.com/thread/6877361?start=0&tstart=0 This is why I prefer CCC, it costs, but it is less worry for me. Also, time Machine can eventually fill up the backup hd, and then it will start deleting the oldest backups. Sorry if this was more than you wanted to know!
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