Start, pause, or resume a Time Machine backup
You can have Time Machine perform a backup at any time, even if you don’t have Back Up Automatically selected in Time Machine preferences.
Start a backup: Click the Time Machine icon
in the menu bar, then choose Back Up Now.Pause a backup: Click the Time Machine icon
in the menu bar, then choose Skip This Backup.Resume a backup: Click the Time Machine icon
in the menu bar, then choose Back Up Now.
If the Time Machine menu isn’t in the menu bar, choose Apple menu > System Preferences, click Time Machine, then select “Show Time Machine in menu bar.”