. This opens Software Update in System Preferences to start the download.
softwareupdate --fetch-full-installer --full-installer-version 10.15.7 Download Macos 10.15 Catalina Dmg File
Useful if you are trying to install Catalina on an "unsupported" older Mac. How to Install macOS 10.15 Catalina on an Unsupported Mac How to Install macOS 10
Once finished, the "Install macOS Catalina" app will be in your Applications Microsoft Community Hub Method 2: Official Apple Support Downloads (Updates Only) Here's how to get it: If you’re on
However, a word of caution before we begin: Instead, they use the Mac App Store or the softwareupdate terminal command. Many third-party websites claim to offer the "Catalina DMG," but downloading from untrusted sources can expose you to malware, corrupted files, or modified system software.
If you're looking for a DMG file specifically, you might find it on Apple's support website or through other official channels. Here's how to get it:
If you’re on a newer macOS (Big Sur+), the App Store may redirect or say “Not compatible.” In that case, use the terminal method below.