Force quit the Finder (e.g.: killall -HUP Finder).If you're advanced user, use dtruss or fs_usage to debug it, for instance: $ sudo fs_usage | grep -C4 MyAppWhereCopyDoesntWorkĪnd then notice other apps which appearing exactly when you press the shortcut which potentially you could consider quitting for testing purposes.ĭisable any recent programs that you run or restart your computer.
If Paste menu item is no more greyed out, then maybe it's a problem with Paste command. Test if the Clipboard works from the terminal via: $ echo test | pbcopy If still doesn't work, here are some other suggestions to troubleshoot the problem: If Edit menu flashes and it still doesn't work, then the first thing to do is to restart pasteboard service by the following commands: launchctl stop If it doesn't, go to Keyboard settings in System Preferences and: Make sure when you press CMD+ C your Edit menu in the top flashes, this indicates it works as expected.
