How to burn files on disc from retina macbook pro?

One you get your iDVD project as you want it and ready to burn follow this workflow :

Once you have the project as you want it save it as a disk image via the File ➙ Save as Disk Image menu option. This will separate the encoding process from the burn process.

To check the encoding mount the disk image, launch DVD Player and play it. If it plays OK with DVD Player the encoding is good.

Then burn to disk with Disk Utility or Toast at the slowest speed available (2x-4x) to assure the best burn quality. Always use top quality media: Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.

Since you don't have an optical drive in your MBP you'll need to copy the disk image file to a Mac that does and burn from there with Disk Utility. Or you can get an external optical drive and use it to burn to disk with Disk Utility.

You can't burn via Remote Disk, if that is what you meant. It is very limited in what can be done with it.

This is a pen exempt from this article: Use the CD or DVD drive from another computer with your Mac - Apple Support

Incompatible discs

DVD or CD sharing isn't designed for some kinds of optical media. Connect a compatible optical drive directly to your Mac if you need to use one of these discs:

• Audio CDs
• Blu-ray or DVD movies
• Copy protected discs (such as some game discs)
• Recordable CDs or DVDs that you want to burn or erase
• Microsoft Windows installation discs

You need an external DVD drive and a DVD authoring program such as iDVD or Toast.