I was running a computationally intensive code from Rstudio, and it stopped responding. I used forcequit on the app, and tried to restart my computer. Although Rstudio wont show on ps -ax, mac refuses to shut down saying "Rstudio" is still running. When I right click on Rstudio in dock, it says "Application not responding", I think it tried to start itself and failed somehow. On DiagnosticReports I have a .hang file created after this.

My question is, how do I force quit an application when option+command+escape, or right click > Force quit does not work, pid is not listed and cannot see it running in Activity Monitor.

What might be wrong?

  • 1
    The power button always gets a shutdown for me.
    – Solar Mike
    Apr 22, 2018 at 8:23
  • 1
    If it's not in ps -ax I'd suspect the osx gui is having an issue. Did you try killing dock & finder?
    – Scottmeup
    Apr 22, 2018 at 15:44
  • 1
    No I tried restarting from terminal before which worked :)
    – ozgeneral
    Apr 22, 2018 at 17:23
  • 1
    Duplicate: apple.stackexchange.com/questions/176270/…
    – JBis
    Apr 23, 2018 at 2:24

1 Answer 1


sudo reboot worked, I am not sure if this causes any background issues but everything seems okay now.

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