While I think I’m finally coming to terms with Notification Center, and it’s becoming a normal part of my daily work routine, there are some folks out there who may not like it at all.
For those people, here’s a pretty simple way to get rid of the Notification Center from your Mac, menu bar icon and all.
Launch Terminal from the Utilities folder, which is in the Applications folder. Once it’s open and ready, type or paste in the following command (be sure to copy the whole command, from launchctl to .plist):
launchctl unload -w /System/Library/LaunchAgents/com.apple.notificationcenterui.plist
This will get rid of Notification Center only for you as the current user; it does not need admin access. You may or may not need type or paste the following to kill and restart the Notification Center process:
Go ahead and quit Terminal app, and the Notification Center icon should be gone from the menu bar. To put it back together, open Terminal app one more time, and type or paste the following:
launchctl load -w /System/Library/LaunchAgents/com.apple.notificationcenterui.plist
On my Macbook Air, running 10.8.3, I didn’t need to re-launch Notification center, but if you do, get into your System folder, then open the Library folder, then open the CoreServices folder (or hit Command-Shift-G and type in /System/Library/CoreServices/ to get there super fast). Find Notification Center in there and double click to launch it again.
Source: OS X Daily