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.
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MacOS Catalina, aka macOS 10.15, is the newest version of the operating system that runs on the Mac. MacOS Catalina's name was inspired by Santa Catalina Island, popularly known as Catalina. MacOS Catalina runs in a dedicated, read-only system volume — which means it is completely separate from all other data, and nothing can overwrite your critical operating system files. When you have a compatible Mac and the macOS Catalina download completes, but there’s no prompt for the installation to continue, then search in your Mac’s application folder for a file called.
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