How-To

How to copy a failing drive to a backup using Mac Recovery

If your system appears to be failing, drop down to a lower-level tool.
macOS Big Sur Disk Utility icon
Apple

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Glenn Fleishman’s most recent books include Take Control of Zoom, Second Edition, Take Control of Your M-Series Mac, and Take Control of Securing Your Mac. In his spare time, he makes Tiny Type Museums. He’s a senior contributor to Macworld, where he writes Mac 911.