Question: How can I remove an item from the Dock that appears to be "open" when there is no application for it, and I can't close it?
I have an old Onyx icon on the Dock. The program become corrupted and would not close, so I remove it with Appcleaner-3. The icon on the Dock won't close and it can't be removed in the typical way. Is there a 'brute force' way to remove an icon that appears to be open?
Mac mini, macOS High Sierra (10.13.1), can't close the icon, either.