Download ((top)) Macos 10.15 Catalina Dmg File For Clean Installation

When the download finishes, the file will appear in your Applications folder. Do not run the installer yet. Method 2: Download via Terminal

Always download via the Mac App Store to ensure security. When the download finishes, the file will appear

(to prevent accidental upgrade to Big Sur or later): System Preferences → Software Update → Uncheck “Automatically keep my Mac up to date”. When the download finishes

Do use Catalina as a daily driver. Instead, install macOS Monterey (12) or Ventura (13) via OCLP (OpenCore Legacy Patcher) if your hardware is old. If you absolutely need Catalina for 32-bit apps, disconnect the Mac from the internet after installation. When the download finishes, the file will appear

softwareupdate --fetch-full-installer --full-installer-version 10.15.7