Trying to burn a dual layer DVD on an IMAC and get the message to much content reduce the size of the movie or insert a larger disc. The content is 4.8 gig which should fit on an 8 gig dual layer dvd. Any help appreciated.
First, have you confirmed in your System Information ("About this Mac") that your drive will burn a dual layer disc? Under "Disc Burning" it will show -R DL, +R DL for the selected drive if it is capable of doing so. If it is, try googling your subject title and you'll find directions as to how to do so.