Osu! actually runs really well on my macbook. I've been eagerly awaiting a way to play it for a while and a friend pointed me to this thread today, so I downloaded it and got some beatmaps working. It does take a while to start up, but it eventually does start up. Hitting F5 does fix the beatmap issue so all the songs are on the list. I also downloaded and added more beatmaps afterward, and after refreshing the list, they all came up.
The one problem is that sliders are extremely laggy for me, to the point where it's caused me to completely lose a song. However, for me this is very playable right now.
I'm using a brand, shiny new Macbook Pro running OS X 10.6.8
The one problem is that sliders are extremely laggy for me, to the point where it's caused me to completely lose a song. However, for me this is very playable right now.

I'm using a brand, shiny new Macbook Pro running OS X 10.6.8
