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Apple’s new MacBook Pro features the incredibly powerful M4 family of chips and ushers in a new era with Apple Intelligence. Learn more >
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Apple introduces M4 Pro and M4 Max. Learn more >
Apple introduces M4 Pro and M4 Max. Learn more >
I get the following error on Time Machine when an automatic backup starts on my external drive:
Unable to complete backup. An error occurred while creating the backup folder.
My system configuration: Macbook Pro 10.14.6 Retina mid 2015, 16 GB RAM. Today is the first day of the error and I cannot complete a backup.
MacBook Pro 15″, macOS 10.14
If you can't back up or restore your Mac using Time Machine suggests running Disk Utility's First Aid:
Repair a storage device in Disk Utility on Mac - Apple Support explains how to use First Aid.
It's common to prematurely assume the problem is due to a defective or worn out backup hard disk drive, because it usually is. I added the boldface for emphasis though, because it's frequently overlooked: you need to check both backup and source volumes. To "repair" the startup disk (source) requires restarting your Mac in Recovery mode: Restart your computer in macOS Recovery.
If you can't back up or restore your Mac using Time Machine suggests running Disk Utility's First Aid:
Repair a storage device in Disk Utility on Mac - Apple Support explains how to use First Aid.
It's common to prematurely assume the problem is due to a defective or worn out backup hard disk drive, because it usually is. I added the boldface for emphasis though, because it's frequently overlooked: you need to check both backup and source volumes. To "repair" the startup disk (source) requires restarting your Mac in Recovery mode: Restart your computer in macOS Recovery.
Time machine backup failure
