The Mac OS X Mountain Lion released after being in the Beta version run for a very long time. To add a feather to that cap, Apple has redefined the operating system experience with the Mac OS X Mountain Lion 10.8. Is there any way to upgrade the macOS to Catalina manually or install Catalina on Mac from scratch? The answer is Yes.Īpple have always been impressing the crowd with their software and hardware enhancements over the year. However, it is still in beta test and only available for part of Mac computers with high profile or enrolled in Apple Beta Program. MacOS Catalina 10.15 is the latest operating system that runs on Apple Mac laptops and desktops. X Mac OS X All Versions Download Download MacOS Sierra.DMG Installer.ISO. Download Mac OS X 10.12 MacOS Sierra.ISO. Single click download of MAC OS X Lion 10.7. Single click google drive highly compressed ISO bootable. Download Mac OS X Snow Leopard 10.6 ISO, DMG Directly.