You can also use Terminal to download the full Catalina installer using the command below. Once finished, you can find the macOS installer in your Applications folder with the name "Install macOS Catalina".
Expert users can use the following sucatalog link to retrieve the required components. Check out gibMacOS for an automated tool. It will download the necessary macOS Catalina DMG files and PKG files for you, and create the Install macOS Catalina app.
A bootable installer makes it easy to install macOS Catalina without an Internet connection or on a new Mac. It's also handy when you are installing macOS Catalina on multiple devices.
For details about your Mac model, click the Apple icon at the top left of your screen and choose About This Mac.
These Mac models are compatible with macOS Catalina: ● MacBook (Early 2015 or newer) ● MacBook Air (Mid 2012 or newer) ● MacBook Pro (Mid 2012 or newer) ● Mac mini (Late 2012 or newer) ● iMac (Late 2012 or newer) ● iMac Pro (2017) ● Mac Pro (Late 2013 or newer)
Apple recommends you install the latest Mac OS that is compatible with your device. If your Mac doesn't support the very latest operating system, you may still be able to upgrade to a more recent OS. Use software update or find links to download other macOS installers below...