Hellow guys, Welcome to my website, and you are watching How to Upgrade/Replace the Main Drive in a 21.5-inch iMac (Mid 2017) iMac18,1. and this vIdeo is uploaded by Other World Computing at 2020-09-28T07:30:51-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.