OpenCore Legacy Patcher
Experience macOS just like before
Built with security in mind
Supporting System Integrity Protection(SIP), FileVault 2, .im4m Secure Boot and Vaulting. For many machines, you're just as secure as a supported Mac
Native OTA updates
Install updates the moment they come out just like on a supported Mac
Zero firmware patching
No need to patch APFS ROM support, all protocol upgrades are done in memory and never permanent.