With Catalina, Apple is turning off support for 32-bit apps.
The download is big - around 6.5GB - and Apple said you should probably have about 20GB of free storage space to install Catalina. If not, get one, because you'll most likely need it during the Catalina setup process and logging into iCloud.Ĭheck your free storage space. If you're a Mac user, you probably have an Apple ID. You can either use the Mac's built-in Time Machine backup utility or grab a Mac backup app like Carbon Copy Cloner. Before you download and install any big MacOS update, have a good, current backup of the contents of your Mac's drive, in case something goes south during the installation or afterward and you need to revert back.
