I need to go back to El Cap since MacOS but already updated my backup

So I can not use time machine to go back and recovery of Mac OS allows you to use MacOS even w / drive bootable El Cap in. Is it possible to use a partition and do? Already wiped the HD so it's not a matter of concern. Thank you!

  1. The recovery of Internet startup by pressing Option + command (⌘) r immediately after start-up or that you restart your Mac. Release the keys when you see the Apple logo. Start-up is finished when you see the utility window.
  2. Open utility drive in the Utilities window, then use disk utility to erase your hard disk using the Mac OS extended (journaled) format. Quit disk utility when done.
  3. Choose Reinstall macOS (or reinstall OS X) in the utility window, and then follow the instructions on the screen.
    This installs the system provided with your Mac, when it was new.

Tags: Mac OS & System Software

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