ERROR:process_singleton_mac.cc(106)] Unable to obtain profile lock.
Questa è la soluzione:
I had a similar problem I was able to fix by doing the following: Open Finder, go to ~/Library/Application Support/Google. Move the Chrome folder to the trash and then Chrome will start up! This is kind of a bummer because it will erase all of your settings (you'll even have to reselect your default search provider), but if you have sync set it up, you just turn it back on and it's like nothing ever happened.
Trovato qui.