Shut down your Mac
Turn on your Mac and immediately press and hold Command (⌘) + R
Keep holding the keys until you see the Apple logo or a spinning globe
Release the keys when the Recovery screen appears
If using an Intel Mac and Command (⌘) + R does not work, try Option + Command (⌘) + R
If using an Apple silicon Mac, press and hold the power button until Startup Options appears
Click Options, then click Continue to enter Recovery Mode