macOS Big Sur supports Time Machine on APFS-formatted drives, but there are a few catches

The updated macOS finally allows you to use a drive formatted with Apple’s not-very-new APFS filesystem as a Time Machine destination.

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Apple

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Glenn Fleishman is the author of dozens of books. His most recent include Take Control of Your M-Series Mac, Take Control of Securing Your Mac, Take Control of Zoom, and Six Centuries of Type and Printing. In his spare time, he makes Tiny Type Museums. He’s a senior contributor to Macworld, where he writes Mac 911.
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