Just ordered my 1st imac only the base 21.5 model in the refurnished store. Thought i get the dvd drive as have movies i watch on laptop and did not want them to go to waste. Finally thought its time to move away from windows but only ever been on a mac in the apple shop. If i want a external hard drive ( all my tv shows & films on there )do i have to reformat my external from ntfs ? Is there any apps or programs to watch uk tv etc out there or will i need a eye tv dongle.