You’ll almost certainly see this error which perversely leads you to believe that repair failed because of problems found on the volume, and recommends that you “back up the data on this volume”.
Once Time Machine has completed one of its hourly backup sessions, open Disk Utility, select that backup volume and click First Aid. This is easily demonstrated if you already make Time Machine backups to an APFS volume, and are running macOS 12.4. Yet, over five years after the new file system’s release on 27 March 2017, Disk Utility is still riddled with bugs, and can’t check or repair disks containing Time Machine backups unless the Mac is booted in Recovery Mode, or without resorting to skulduggery with hidden snapshots. While there are several excellent alternatives which can perform the same tasks on HFS+ volumes, Apple’s policies on APFS have successfully locked all competition out of this market. After all, any file system without sufficient tools to check, repair and maintain it isn’t fit for release, is it?ĭisk Utility and its command line check and repair tool fsck_apfs are thus among the most important utilities in the whole of macOS. In doing so, it made a commitment to its users that Apple itself would provide all the tools necessary to work with its new file system. When Apple developed APFS, it decided neither to make it open source, nor to document it sufficiently to help third parties develop their own utilities for its maintenance.
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