The exact same thing happens to me. It's irritatingDangerousGame wrote:
A day of firsts for me. More to the point Osu! refuses to start on OSx 10.8.4 despite waiting the maximum 5 minutes and beyond for X11 to set up. The most detailed description I can give is that it opens, remains open and then nothing happens. It sits in my application bar without any action, plus right click quitting does nothing.