You can find the macOS Catalina page in the App Store. Clicking "Get" will download the installer directly to your /Applications folder.
If you are using a Windows PC or an internet-recovery mode that prevents you from using Apple's official download routes, internet repositories like the host community-uploaded copies of the official retail DMG files. If you choose to use a third-party archive: Search for "macOS Catalina 10.15.7 DMG retail".
This will open the Mac App Store directly to the macOS Catalina download page. However, please be aware of the following limitations:
directly from Apple Support. This file is intended for updating an existing system, not for a fresh install from scratch. Terminal Command
Before initiating an install, confirm your Mac supports Catalina. The operating system is fully compatible with these models: Early 2015 or newer MacBook Air: Mid 2012 or newer MacBook Pro: Mid 2012 or newer Mac Mini: Late 2012 or newer iMac: Late 2012 or newer iMac Pro: 2017 or newer Mac Pro: Late 2013 or newer
Once finished, the file named Install macOS Catalina.app will be saved directly into your folder. Method 2: Download Using the macOS Terminal
Click "Get" to download the installer to your Applications folder.
Avoid downloading macOS DMGs from third-party "free download" sites or torrents. These files may be modified with malware. Always use official Apple sources
Terminal will show a text progress bar reading "Downloading".
The safest way to get macOS Catalina is directly from Apple. This ensures your file is free from malware, tampering, or corruption.
Before downloading, ensure your Mac hardware supports macOS Catalina: Early 2015 or newer MacBook Air: Mid 2012 or newer MacBook Pro: Mid 2012 or newer Mac mini: Late 2012 or newer iMac: Late 2012 or newer iMac Pro: 2017 or newer Mac Pro: Late 2013 or newer
and run the following command: sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume Enter your admin password and wait for completion. macOS Catalina 10.15.7 System Requirements
Click to pull the file into your Applications folder. Method 2: Use Apple Terminal Commands