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How do I restore my MacBook Pro firmware?
Step 4: Restore the firmware and erase all data In the Apple Configurator 2 window on the first Mac, select the DFU icon of the Mac to be restored. Do one of the following: Choose Actions > Restore, then click Restore. Control-click the selected DFU icon, then choose Actions > Restore, then click Restore.
Can you update firmware on Mac?
Firmware updates are included in macOS updates. To check for updates on your Mac, choose Apple menu > System Preferences, then click Software Update. Note: Firmware shouldn’t be confused with malware, which can be harmful to your computer.
How do I reinstall the same OS on my Mac?
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
Is it possible to reinstall Mac OS firmware?
If your Mac needs a firmware update and it isn’t installed automatically, check to see if a manual updater is listed below. For the record – upgrade is defined as going from one version of macOS/OS X to the next one up.
How to reinstall an older version of Mac OS?
Click on Disk Utility > Continue. Select the main volume and click Unmount then Erase. Quit Disk Utility (Disk Utility > Quit Disk Utility). Now click on Reinstall macOS or Reinstall macOS and Continue. Follow the instructions to reinstall macOS using the installer you just saved to the external drive (link to separate article above).
Why do I need a disk to reinstall Mac OS?
If you didn’t install the Firmware update for that Mac that would have enabled Internet Recovery, then you will need the original installation disks. If you boot up holding down cmd-opt-R and it doesn’t show a spinning globe where the Apple symbol would be, then you are not going to be able to reinstall from IR.
How do I reinstall Mac OS Sierra 10.12.4?
Shift + Option/Alt + Command R (if you are running Sierra 10.12.4 of later) will install the version of macOS that came with your Mac, or the one closest to it that is still available. Follow the steps in the section above to reinstall macOS via recovery.