If you have a Mac older than these models listed below this patcher may allow you to run macOS 11 Big Sur on it. 2013 Macbook Pro 2013 Macbook Air 2013 Mac Pro 2014 iMac 2014 Mac mini 2015 Macbook Take note that the older your Mac is the less support and less speedy/responsive it may be. My 2012 iMac is only officially supported up to macOS Catalina. To this day it still receives Security Updates with the latest one being sent out last 9 Feb 2021. I expect these Security Updates to end by November 2022 giving me a little over 10 years of useful life.