New answers tagged settings
Open 'Settings > Notifications > Game Center' and turn off all notifications. Your settings should match those in this image.
Try this: Go to System Settings -> Users and Groups CLick the Login Items tab. If the program is listed here, you should be able to hide it when logging in by check the box next to the program item or if you don't want it to open automatically (in case you don't need to access NTFS formatted drives) you can highlight the item and click the minus in the ...
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