Released on October 7, 2019. This OS is included with lots of additional new features like sharing your screen to iPad (Sidecar) and is capable of running iPad apps. Catalina is the first version of macOS to exclusively support 64-bit applications. MacOS Catalina also split up iTunes into 3 apps: Music, Podcasts and Movies. Because of the removal of iTunes, syncing your devices is done in Finder.