Original sentence: While originally only available for Macs with a SuperDrive, it is now included at no additional charge with all new Macs; from iDVD 6 onwards, Apple supports the ability to burn projects with third-party optical drives
Edited sentence: While originally only available for Macs with a SuperDrive, it is now included at no additional charge with all new Macs — as of iDVD 6, Apple has finally opened the door to burning projects with third-party optical drives