Download macOS Catalina 10.15 DMG File: macOS Catalina 10.15 DMG file or the macOS Catalina 10.15 Installer is uploaded in the Google Drive. For more safety, we have uploaded inside Google Drive so that while installing your computer shouldn’t get virus or malware. If you want to free update to macOS 10.15.5 Final build then you can do this via Mac App Store or if you want to free download and o..