I absolutely hate the Notification Center in macOS. I had successfully turned it off permanently in an earlier version of Big Sur by executing the following commands in the Terminal, followed by a restart:
launchctl unload -w /System/Library/LaunchAgents/com.apple.notificationcenterui.plist killall NotificationCenter
However, upon upgrading to 11.4, the Notification Center reappeared spontaneously, and I could not turn it off again by executing the above commands. When I tried, the following error message appeared:
Unload failed: 5: Input/output error
If I try
sudo launchctl unload -w /System/Library/LaunchAgents/com.apple.notificationcenterui.plist
it gives me
Unload failed: 113: Could not find specified service
After a restart, the
launchctl command above works and the Notification Center remains permanently disabled.
But! If I go back to Recovery Mode and enable System Integrity Protection again by executing the command
then the Notification Center appears again in “normal” mode after a restart.
Question: How big of a deal is it to leave System Integrity Protection disabled? Experts seem to agree it is a bad idea because it creates a security liability. But if leaving it turned off is the price I have to pay for getting rid of the Notification Center, I lean towards paying that price. At the same time, I wonder if there is a superior solution. Any thoughts/advice on this?