How to make sure Time Machine works when you upgrade your hard drive<article>
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<p>When you attach a new external drive for your Time Machine backups, or upgrade the hard drive in your Mac (the one that's being backed up), it can cause some confusion for Time Machine. macOS tracks drives with behind-the-scenes numbers, not just their display names, and if you swap drives, this can often confuse Time Machine or result in a prompt asking if you want to inherit an existing backup set for a new drive. If macOS gets it wrong, you have to turn to the Terminal command line and type in text commands to get things back on track.</p><p>Macworld reader Richard had a mismatch happen to him when he upgraded to a new Mac by using a Time Machine backup for migration. He was prompted to inherit the old machine’s backup—the one he just used, ostensibly—but macOS picked incorrectly, and shifted him to a completely other backup instead, one from 2012.</p><p class="jumpTag"><a href="/article/3261146/macs/how-to-make-sure-time-machine-works-when-you-upgrade-your-hard-drive.html#jump">To read this article in full, please click here[/url]</p></section></article>
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How to make sure Time Machine works when you upgrade your hard drive
