needmofun wrote:
do i have to install boot camp to be able to open osu! on my mac? cause now i don't have bootcamp, and everytime i click osu!, the icon just jumps once, stops and it never opens-_- please help?!?!?!

You do not need boot camp. This version of osu! runs through Wine and X11.
When you download osu!, make sure it's in a place like Desktop or Applications. If you have it in any folder that has a space in it's name (Example: Shadow's stuff), osu! will not run. Once you have in in a good place, open it. It'll take a few minutes to load, so be patient.
It osu! still closes, open console.app (Found in /application/utilities) and then open osu! again. Copy and paste the error message that comes up.
...but is it really all that important?