Okay so I have the White Intel iMac (the one before the current aluminum one) and it's running Tiger 10.4. I edited my school project on iMovie and when I load it into iDVD to burn it onto a DVD it says that it's waiting for device, then my iMac spits out the DVD and says no disc in drive and to insert a recordable DVD disc. I'm putting in a recordable disc. I've tried other blank DVDs and still the same problem. The blank DVDs say DVD-R Ver2.1/1x-16x on the front. I've used iDVD before to burn my DVDs and have always been successful in doing so. Someone please help. I'm desperate!