If you're using one of these computers with OS X Mavericks or later, you can install macOS Catalina. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier. Learn how to upgrade to macOS Catalina.
Luckily, there’s a way to fix most problems with apps not working in Catalina: Check whether a developer has a 64-bit update for your app. Look for an alternative app compatible with macOS 10.15. For instance, most of the Adobe apps for photo and video editing can be replaced with Capto or CameraBag Pro. Installing Catalina is a sweeping upgrade because the new operating system will no longer support apps designed to run on the 32-bit processors that most computers had in the 1990s and early 2000s. MacOS 10.15 Catalina is coming, and it will be the first release to completely drop support for 32-bit apps. This means that apps that you rely on for your day to day workflow might suddenly not. MacOS Catalina's iPad apps for the Mac are here, but the story is just getting started Catalyst has been slow to take off on MacOS 10.15, but here's a look at the state of tablet apps migrating to. Before upgrading to macOS Catalina, make sure that all of your apps are 64-bit apps. When macOS Catalina was in beta, EveryMac.com recommended that for those with 'mission critical' computers, it would be wise to let others do the beta testing and wait for two or three 'bug fix' releases after the 'final' version ships, as well.