iMac mid 2014
I want to sell my iMac mid 2014 that I bought in 2015. I had a problem with the Mojave uptade so I formated my iMac and put MacOs Sierra. Is it ok to sell it with Sierra or should I had put HighSierra instead ?
Apple’s advice below should help.
What to do before you sell, give away, or trade in your Mac - Apple Support