The DVD's are formatted to be played in your home theater DVD player, not for editing. If you have software that can convert VIDEO_TS files to another format, you would then be able to edit the movies in another program such as iMovie. Please note however that all video work is done in a PC format and data may not be visable on a Mac. We are unsure as to why some Macs will see the data while others hide the data. It will still play on a computer or DVD player but may not be editable.