(for virtual machines or specific deployment):

Once finished, the file named Install macOS Catalina.app will be in your Applications folder. 3. Creating a DMG or Bootable USB for Clean Installation

A clean install allows you to experience these core features without legacy software interference: How to Perform a Clean Installation of macOS 10.15 Catalina 10 Oct 2019 —

Always download via the Mac App Store to ensure security.

A: ~8.2 GB for the full installer; the raw InstallESD.dmg is ~6.8 GB.

Visit the Apple Support page for older macOS versions.

Apple does not typically provide a direct "DMG" link on their main website. Instead, they provide a link that opens the .

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