Browser plug-ins and extensions are disabled. Links to Apple's support website are included.

Get Help Online: Use Safari to browse the web and find help for your Mac.

Reinstall macOS: Download and reinstall the Mac operating system.

Restore From Time Machine Backup:Restore your Mac from a Time Machine backup.

After starting up from macOS Recovery, select a utility, then click Continue:.

Startup is complete when you see the utilities window:.

Enter the requested password to continue.

You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac.

Release the keys when you see an Apple logo, spinning globe, or other startup screen.

Turn on your Mac and immediately press and hold these two keys: Command (⌘) and R.

Mac Os X Utilities How to start up from macOS Recovery You can start up from macOS Recovery and use its utilities to recover from certain software issues or take other actions on your Mac. MacOS Recovery is part of the built-in recovery system of your Mac.

Os x utilities on startup