MacBook Pro first os
I have a MacBook Pro and I want to know what was the first macOS it can be compatible with so I can downgrade it to the os. MacBook Pro A1398
MacBook Pro 15″, macOS 10.13
Question marked as
We need more than the Model $, A1398 covers 2012 tolae 2015 MBPs. :)
Could be anywhere from 10.7.4 Lion to 10.10 or even 10.11
Which exact Mac do you have. Apple logo at top left>About this Mac…
Also...
Start up from macOS Recovery
To start up from macOS utilitRecovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if you never installed macOS Sierra 10.12.4 or later… How to reinstall macOS - Apple Support
Command (⌘)-R
Install the latest macOS that was installed on your Mac.
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
Shift-Option-⌘-R
Install the macOS that came with your Mac, or the closest version still available.