Running New macOS Versions on Older Macs: OpenCore Guide
Originally Published 2 years ago — by AppleInsider
Apple removes support for older Mac hardware in new macOS releases, but the Hackintosh community has found a way to run modern versions of macOS on older Macs using OpenCore. OpenCore is a boot loader that modifies the boot blocks on a PC's storage device to allow the startup of multiple operating systems. The OpenCore Legacy Patcher (OLP) from dortania is a recommended tool for installing and running macOS versions back to Big Sur on Intel-based Macs as old as 2008 and later. However, using OpenCore and modified versions of the macOS installer may violate the Digital Millennium Copyright Act (DMCA) and can be unstable, so caution is advised.