The previous version of the Mac operating system is macOS 10.15 "Catalina".  Useful guides to install this version of macOS on a P...

​ The following guide is a complete walkthrough for updating to or installing a fresh version of macOS Catalina. It requires no experi...

    Step 1: Download macOS Catalina ​   Step 2: Create a Bootable USB with UniBeast ​   Step 3: Recommended BIOS Settings ​   Step 4: Instal...