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How do you change the screensaver for the login screen on Catalina? The new default login screen screensaver causes my Mac Mini to overheat so the fan runs really loud.
Mac mini, macOS 10.15
Found this terminal command to disable the screensaver:
sudo defaults write /Library/Preferences/com.apple.screensaver loginWindowIdleTime 0
Found this terminal command to disable the screensaver:
sudo defaults write /Library/Preferences/com.apple.screensaver loginWindowIdleTime 0
According to this discussion you need to login as the root user and change the screensaver:
How do you change the screensaver for the login screen on Catalina?