Once you have the installer in your Applications folder, you can create a bootable drive (requires a 16GB+ USB): Connect your USB drive and name it Run this command in Terminal:
to complete the installation.
The download progress will appear in the Terminal. Once complete, the installer will be in your Applications 3. Alternative: Reinstall via Recovery Mode download macos catalina 10.15.7 full installer
⚠️ Once the download completes, the installer will launch automatically. If you want to use it to create a bootable USB, do not click Continue . Instead, press Command + Q to close the installer. You will find the file named Install macOS Catalina.app sitting safely inside your /Applications folder. Method 2: Download Using the Terminal (For Advanced Users) Once you have the installer in your Applications
codesign -dv --verbose=4 /Applications/Install\ macOS\ Catalina.app Alternative: Reinstall via Recovery Mode ⚠️ Once the
Open Disk Utility, select your USB, and format it as Mac OS Extended (Journaled) with a GUID Partition Map .