After restoring Lightroom 2.7 to a new iMac, on exporting I get Error Message: "Unable to Export: Disc burning is not supported on this computer. It has been disabled." I uninstalled Lightroom/reinstalled today, it fixed problem and lost 10,000 of my photos from Library. Second time I opened it today, photos still missing and original problem was back.
Restored photos to HD from Time Machine; attached an accessory DVD player and it no longer shows "Can't Export" message. This iMac does not have a built-in DVD player. But it still should Export to Desktop or whatever file I choose, and it will not. Ideas? I see this glitch all over Google but no one has suggested a solution that has worked for me.