I've had this happen to both myself and one of my friends who owns the same iMac (2010 2.93 Core i7), both with the stock 4gb Samsung ram. It boots normally, and then after the Apple logo disappears I get this screen. Anyone know what's going on? I don't really see it affecting anything in any way, other than the occasional wtf after it boots up. Some more info about the issue: When I upgraded the ram to a different brand it only made it worse (I do not recommend using anything other than Samsung ram btw, unless you want Safari to crash the entire thing while watching youtube videos - presumably having to do with flash). Anyway, sent that ram back and added more Samsung ram, still get the weird screen, no crashes tho. Also, the weird screen after boot is always the same with the new ram - it was "arranged" differently and made noise with the other ram I had.