Hey guy's R4GE VipeRzZ here, and today I'm going to show you how you can install Mac OS Sequoia / version 15 on a 2012 Mac Mini.
Open Core Legacy Patcher: https://github.com/dortania/OpenCore-Legacy-Patcher
To do this we will use Open Core Legacy Patcher to allow us to install Mac OS Sequoia on an unsupported Mac. This isn't supported by Apple so don't expect any support from them.
The Open Core Legacy Patcher adds a third party bootloader that sits inbetween the Mac hardware and OS. It then makes the OS think it is installed on a supported device, and applies patches to make newer features work on old mac's.
