OS X El Capitan: Start, pause, and resume a Time Machine backup
You can have Time Machine perform a backup at any time, even if the On/Off switch in the Time Machine preference pane is Off.
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.”
Last Modified: Jun 20, 2016