Can't run VLC on 10.13.6 Here's how to reproduce this:


Installed VLC via: brew cask install vlc*
Open VLC (via Spotlight/Finder/open/something else using launchd**)
Finder alert dialog pops up with message: 


  The application “VLC.app” can’t be opened.



This has never been a problem until I installed the latest version. I'm guessing it's more something to do with launchd than VLC (my other MacBooks are all fine).

How can I diagnose what's failed and/or make this app launch again?

* makes no difference downloading with browser).

** I'm able to start it via: $ /Applications/VLC.app/Contents/MacOS/VLC, so I am guessing it's something to do with what is launching it.
I don't have the same issue, but before you try to remove the vlc 3.0.4 and try installing an older version, do you have any errors in the doctor output:

brew doctor
brew cask doctor


If not, then an upgrade, reinstall of the VLC and then force linking the app again might help. Also - if you open the console log when you open the VLC app - can you see any interesting or relevant errors right around when you launch the app?

brew upgrade
brew cleanup
brew cask reinstall vlc
brew link -f


Feel free to @ me in the comments if you make a substantial edit or ask a follow on question to review the output of the above if it's not clear how to fix this once you dig in a bit.