Downgrade mac os high sierra to mac os mavricks

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

I then read that another problem could be the OS in which the installer was created on in the first place to remedy this, I tried a factory reset, but here's the kicker: when at the point of re-installing the factory OS, it actually is UPGRADING to High Sierra, as oppose to the one that came with the MacBook. I repeated the process, same thing afterwards, I unlocked the thumb drive, and unchecked the ignore ownership box (read it on a forum), and I ran into the same issue. I got to the point where I was asked to choose which disk to boot from, I chose the thumb drive, and I ran into the 'prohibited' sign.

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

The process ended up taking approx an hour, but the agent had to end the call prior to the process finishing, but gave me instructions on how to complete the process. I instead chose to downgrade to a previous OS I ran through the boot installation process through the terminal with Apple Care on the line. I reached out to Adobe and the 'help' I received was to purchase the latest version of the software, as they stated they couldn't guarantee compatibility with my OS. I installed my CS6 Master Collection lifetime license on it, and about a month later, I ran into some technical difficulties with Audition. Here's my issue: I recently bought a used 15' Mid 2010 MacBook Pro.