A Time Machine backup can stall for a number of reasons, the most common of which is a full disk. If your backup is stalled, you’ll see an error message telling you that the backup can’t continue.
There are a few things you can do to try to fix a stalled backup:
– Make sure your Mac has enough disk space to complete the backup.
– Quit any apps that are using a lot of disk space.
– Try restarting …
