I have this problem also. Mostly with Calendar events. They hang, and to dismiss them I have to reboot the computer.
Non-Apple programs running: Moom, OmniFocus, 1Password
Menu-bar items: OmniFocus, Alfred, Dropbox, Australian Weather
Currently Being ModeratedSep 23, 2013 11:39 AM (in response to Andrew Bayly)
I see it's been nearly a year since the last post on this topic. Even with the update to 10.8.5 it still happens after my MacBook Pro Retina 16GB Ram (early 2013 build) is left on for a long period of time - like overnight.
Rebooting is the only resolution I can find as well.
- Apple support suggested turning off the firewall and de-encrypting, which I did.
- My anecdotal and unscientific observation: Helped somewhat by lengthening the time to 'beachball'.
I was also advised to completely wipe and reinstall OS - oh my...
Does anyone have anything new to add before I take this draconian measure?
Message was edited by: Occum\'s Razor
Currently Being ModeratedSep 23, 2013 11:51 AM (in response to Occum\'s Razor)
Currently Being ModeratedSep 23, 2013 1:40 PM (in response to Occum\'s Razor)
Yes, indeed, I have something to add. I can't remember where I found this, but it works. It does not fix the bug, but it fixes the short-term problem without the pain of a full reboot.
Open "Activity Monitor". It's a system utility. You can find it using spotlight. Set the "Process Name" column to alphabetical order, and find "Notification Center". Oddly, it does not have an icon beside the name. Select it. In the top left corner of the Activity Monitor window, there is a red octagonal button marked "Quit Process". Hit that.
Notification Center will quit, and the annoying notification will disappear, along with the beachball.
It's not perfect, but it's better than the constant restarts.
I seem to have the same problem (thanks, Occum\'s Razor for linking these two threads).
1.) One can temporarily resolve the issue by killing the Notification Center's process using the Terminal command "killall NotificationCenter" (no quotes, no space between Notification and Center) or by using Andrew Bayly's Activity Monitor approach above.
Message was edited by: Brian M. Holmes (formatting problems)iMac (24-inch Early 2008), OS X Mountain Lion (10.8.5), with homemade Fusion Drive.