macOS Sierra: Time Machine troubleshooting

Time Machine troubleshooting

Time Machine must create a new backup

See:

If you see a message that you must create a new backup

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. For more information, see Keep your Mac up to date and the Apple Support article About AirPort base station firmware updates.

Last Modified: Sep 26, 2016
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