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#Downgrade mac os high sierra to mac os mavricks how to

It will not require an Apple ID to install.

That reinstalls the operating system installed on your Mac when it was new.

Then, select Disk Utility to completely erase your startup volume.Ĭhoose one of the Mac OS Extended (Journaled) formats.

If you do not boot Internet Recovery, you will boot into the existing Recovery Partition, which will only allow you to reinstall your existing operating system.

You will need a viable Internet connection, preferably a fast one, and one that does not require a "login screen" for you to connect to the Internet.

#Downgrade mac os high sierra to mac os mavricks how to

Read the * note to determine how to force Internet Recovery.Shut down your Mac, and restart it using macOS Internet Recovery.To learn how to use Time Machine read Use Time Machine to back up or restore your Mac.Īfter you have that backup and are satisfied with your ability to recover its files - or you decide that you do not need or want any of the information on that Mac, and understand that it will be irretrievably and forever lost, continue with the steps below.

Please read macOS Sierra: Revert to a previous macOS version.Īssuming you have no Time Machine or equivalent backup of your essential files and other documents, create one now because you will need to completely erase that Mac in order to downgrade its operating system from Sierra to any earlier version. Anyways, if i make a bootable 10.9 USB, can i simply format my HDD from recovery mode and reinstall 10.9 holding options while starting up?