What Linux works on an iMac.

I have an iMac 27" with a core 2 duo processor. 3.03ghz 1tb hard drive. i've tried ubuntu but i can not get it to work. at first after i would press install ubuntu it would just go blank...now it has the " moving dots " and sits there for a bit...some text comes and now im back at an all black screen. Its been hours and just can't get it to work. is there a linux distribution that will work " easily "? thanks.

 

thanks i'll give it a try lol.