Unable to open Keychain Access on Mac When I try to open Keychain Access using Spotlight or Finder, I see an error saying: The Application "Keychain Access" is not open anymore. When I try to launch using open -a, I get:

$ open -a Keychain\ Access.app/
Unable to find application named 'Keychain Access.app/'


It was working fine until yesterday. A restart did not seem to help.



Update:

It looks like I shouldn't rely on Terminal's autocomplete while using open. Removing the trailing slash did not fix it. The new error is: 

$ open -a Keychain\ Access.app
LSOpenURLsWithRole() failed for the application /Applications/Utilities/Keychain Access.app with error -600.


Update 2:

Somehow it got fixed on its own. Among the things I tried was a restart, opening the app via the Terminal, and removing the plist from ~/Library/Preferences. None of those seemed to have had an immediate effect, if any at all, but Keychain Access is finally opening for me.
Lose the /.

$ open -a Keychain\ Access.app


works for me.
Or even:


  $ open -a Keychain\ Access