I use a MBP for the regular code book 2011 and have no problems after you install the "FileOpen Plugin". I downloaded the NEC free with the softbound copy of the book. I use Adobe Acrobat 9 but it should make no difference if you use Acrobat or Reader. It might be a problem if you use Preview, never tried that. Just tried it with Preview and it won't work. Works perfectly with Adobe products.