If you wish to remove CommCenter from your Mac, click the Apple logo in the top-left corner of your screen and go to System Preferences. In this menu, select iCloud, and uncheck the Keychain app.  Your Mac will ask you to delete the local iCloud Keychain; proceed. Your data will still be on Apple's servers, and you can check the box again in the future if you want.  If it doesn't solve your issue, uncheck it again, and go to the option "~/Library/Keychains." In the Finder, select "Go > Go to Folder" (or use the shortcut "⌘ Shift G") to get there quicker. A folder will open with a subfolder inside with a long name made of numbers and capital letters. Drag this subfolder to the Trash, restart the computer, empty the Trash and re-enable your Keychain. Read More: Track Stolen Or Lost MacBook Without iCloud [BEST WAYS]