If you own a classic Mac—say a 2008 MacBook Pro or a 2011 iMac—you’ve likely heard of MacPostFactor . For years, it was the go-to patcher tool, allowing users to run OS X Mountain Lion through Mojave on officially unsupported machines. However, MacPostFactor has been discontinued for years, lacks support for modern macOS versions, and can be unstable on newer (yet still old) hardware.