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Before installing, confirm your Mac hardware natively supports macOS Catalina: 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: All configurations (2017 and later) Mac Pro: Late 2013 or newer Troubleshooting Common Download and Installation Errors 1. "The installer payload failed signature verification" download macos catalina 10157 dmg file better

Creating a bootable USB installer is highly recommended, especially if you plan to perform a clean installation or install Catalina on multiple machines. A bootable USB drive allows you to boot your Mac directly into the macOS installer without needing an existing operating system. Complete Guide to Safely Downloading the macOS Catalina 10