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Link to original content: https://support.apple.com/en-asia/guide/mac-help/mh15653/10.14/mac/10.14

Time Machine troubleshooting on Mac - Apple Support

macOS Sequoia 15

macOS Sonoma 14

macOS Ventura 13

macOS Monterey 12

macOS Big Sur 11.0

macOS Catalina 10.15

macOS Mojave 10.14

macOS High Sierra

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Table of Contents

Time Machine troubleshooting on Mac

Time Machine must create a new backup

See:

If you need to create a new backup from Mac

The backup disk is unavailable or can’t be found or “mounted”

See:

If Time Machine on your Mac can’t find your backup disk

If you need a password to unlock your backup disk on Mac

Apple Support article: Time Machine - Backup volume could not be mounted

An incomplete, interrupted, or failed backup occurred

See:

If a Time Machine backup on your Mac is interrupted

If Time Machine on your Mac doesn’t back up certain files

Verify your backup disk on Mac

Time Machine is slow or seems stuck

See:

If the Time Machine backup disk for your Mac is full

If Time Machine is slow on Mac

If Time Machine remains in the “preparing” stage on Mac

General troubleshooting

Make sure your backup disk is plugged in, turned on, and securely connected to your Mac. If your backup disk is on a network, make sure both the disk and your Mac are connected to the network. If the network is experiencing problems, your backup disk may not be available.

Download and install all recent updates to macOS. If you have a Time Capsule, update it with the latest software and firmware. See Keep your Mac up to date and the Apple Support article Update the firmware on your AirPort base station.

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