Once the App Store opens, click "Get." The installer will download as a .app bundle, not a .dmg .
Because of this, "hot" often means freshly extracted by a developer . The only safe way to get a true DMG is to extract it yourself from Apple’s official packages. download macos catalina 10157 dmg file hot
Once finished, look for "Install macOS Catalina" in your Applications folder. Once the App Store opens, click "Get
: Best if you are currently on version 10.15.6 and only need the final incremental patch. Available at Apple Support (Standard Update) Alternative: Terminal (Fastest for Full Installer) Once the App Store opens
Pro Tip: If that link 404s, use MDS (Mac Deploy Stick) or gibMacOS on GitHub. These Python scripts scrape Apple’s servers live to give you the current "hot" download URL.