Release these keys as soon as you see the Apple logo.

Restart your Mac while holding down the ‘Option+Command+R’ keys.

Just be aware that Internet Recovery only works with networks that use WEP and WPA security, which can be an issue if you’re using a proxy network or PPPoE. If you don’t have a Recovery partition, then you can always install macOS via its Internet Recovery feature. Once you’re happy with your Time Machine settings, navigate back to ‘System Preferences… > Time Machine’ and then click ‘Back Up Now.’.Select all the items that you want to exclude from your backup. If there’s any files, apps or other items that you want to exclude from your backups, then click ‘Options…’, followed by the little ‘+’ button.If this is your first Time Machine backup, then click the ‘Select backup disk…’ button, and choose the drive that you want to use for your backups.

Navigate to ‘System Preferences… > Time Machine.’.Select the ‘Apple’ logo from your Mac’s menu bar.

Don’t forget your Time Machine backup!īefore you start, you should create a full Time Machine backup, so you can restore all of your files, folders and apps once you’ve installed a fresh copy of macOS. If resetting the PRAM doesn’t work, then there’s several ways that you can reinstall a fresh copy of macOS, without a Recovery partition. Once your Mac has booted, try re-running the ‘diskutil list’ Terminal command, to see whether this has resolved your issue. To reset the PRAM, restart your Mac while holding down the ‘Command+Option+P+R’ keys until you hear macOS’ distinctive startup chimes for a second time. How To Properly Factory Reset a Mac & Reinstall Mac OS

Os x utilities macbook pro