If you're upgrading from macOS Sierra or a later release, you need 22GB in total.However, you need additional storage during installation. The macOS Monterey installer clocks in at a hefty 12.16GB, and you can download it via the integrated Software Update tool or the Mac's App Store. It comes with dozens of new features and enhancements, such as Universal Control, Focus, and SharePlay, and is also faster and more efficient than previous macOS versions. MacOS 12 Monterey is the latest major public release of Apple's operating system for the Mac. How much space do you need for macOS Monterey? You get one cleanup for free, so you've got nothing to lose. It can help you delete obsolete and junk files from the system in minutes. If you're crunched for space and time and want enough space to install the latest macOS updates quickly, download MacKeeper. MacOS for both Apple silicon and Intel Macs use the same amount of storage, so that's something you don't have to worry about. So, whether you're contemplating an upgrade to the newest version of macOS or want to know how much disk space the operating system uses so you can make your purchase accordingly, here's a breakdown of macOS storage requirements by version: The information also lets you plan ahead when buying a new Mac and helps you determine if you can manage with a 128-256GB baseline model or need a larger capacity drive. View the complete list of compatible computers.Since macOS accounts for a sizable chunk of your Mac's hard drive or SSD, knowing its storage requirements gives you a clearer picture of the space you must have at hand during and after installation. If your Mac isn't compatible with macOS Catalina, the installer will let you know.

To find your macOS version, Mac model, memory, and storage space, choose About This Mac from the Apple menu .

* To upgrade from Lion or Mountain Lion, first upgrade to El Capitan, then upgrade to Catalina. (NOTE: There is a known issue with older versions of the Pulse Secure VPN client. 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. If you're using one of these computers with OS X Mavericks or later,* you can install macOS Catalina.

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