There may be occasions when you need to force a Time Machine backup. Maybe your backup disk is full, or you’ve deleted files that you want to restore. Whatever the reason, here’s how to force a Time Machine backup.
First, make sure Time Machine is turned on. To do this, open System Preferences and click on Time Machine.
If Time Machine is on, you’ll see a green button that says “Back Up Now”. Click on this button to start the …