This is my second iMac, so I know how it works. But for some reason this new one doesn't work like it should? In that, it doesn't "eat" the disc. It doesn't even do anything even tho I inserted the disc all the way in? Is it broken? Or is this a new kind of superdrive where you have to stick it way in yourself? At first I thought, maybe there's no superdrive at all? But system profiler says its a PIONEER DVD-RW DVRTS09.