Anyone with a 24" iMac or who knows, I know the 250 standard drive is a seagate. if you have a 500 can you check which drive is in there. seagate or maxtor? if it is a seagate is there any way to tell if it is their 7200.9 or 7200.10. The 7200.10 has a 16MB cache as well as perpendicular drive recording.