I get following error each time if I start kicad on Mac OS X 10.11: kicad is already running, Continue?. The problem is that actually it is not running.
Atleast ps aux | grep kicad did not show anything before launching it.
Well this is little nuisance compared to this that now I cannot open my schematic anymore. It says:
Error
Schematic file '/Users/xxx/xxx.sch' is already open.
However I can open some older kicad projects that I have. Something happened to these particular project files. I might have hard rebooted mac while kicad was still open. Maybe there are somekind of lock files or something that are not cleaned up, because it worked nicely before.