MacOS – Clicking Notification Center Button Makes Dock Hang

Apps can hook into the sharing options with the new NSSharingService API. It sounds like custom LaunchBar actions can be made with any UNIX executable file, so you could probably write a small command line tool (or you may need to build an actual app — you'll have to test it out) which activates this API (using NSSharingServiceNamePostOnTwitter), and that should display the tweet dialog.

Update: to initiate a tweet from AppleScript, you can do the following:

tell application "System Events"
    tell process "Notification Center"
        -- activate notification center
        if (count of UI elements) is 1 then click first menu bar's first menu bar item
        -- click the tweet button
        click button 1 of UI element 1 of row 2 of table 1 of scroll area 1 of window "Window"
    end tell
end tell

Furthermore, you can toggle the "Show Alerts and Banners" / do not disturb mode:

tell application "System Events"
    tell process "Notification Center"
        key down option
        click first menu bar's first menu bar item
        key up option
    end tell
end tell

(This is all very specific to the current window layout of Notification Center and is likely to break with future OS X updates — but there will probably be easy fixes.)

I'm having the same issue as Arnold. The problem might even be slighty worse for me; opun freezing, I can only use keyboard input; mouse clicks aren't registered anymore. I use QuickSilver to launch a terminal and running "killall -9 Dock" two times kills the dock and releases the mouse. After a couple of minutes the dock is relaunched. Also sending the HUP or INT to Dock will kill it. Sending the TERM signal doesn't though.

I found that the problem can be circumvented by rebooting the system and after reboot ensuring that the first thing you do is to open the notification center. I think that by sleeping your mac without having the notification center open before that is what makes it crash.

Sadly, I didn't find any way to check what's keeping the Dock process busy. It doesn't seem to be the notification centre itself that's crashing (it keeps responding to mouse clicks while nothing else does) but the Dock. So far the only thing I came up with is that this is a problem with launchd, but that doesn't help a lot because killing launchd will kill every application you have running.