I use DVD Copy on my macbook pro. I don't know if it is my drive or the just the blanks that I get or what, but about half of the blank DVDs are dysfunctional. I put them in and they immediately say "burn failed." I usually use Memorex, but I have had the same problem with TDK, Maxell and Fujifilm. Do blank DVDs just suck, or is it DVD copy, or is my superdrive terrible?