Macs burn everykind of disk dude. Btw I suggest to use well known and reliable brands such as Verbatim, Sony, TDK etc. I personally use Verbatim and never lost a bit in years.
I wonder about this as well.
About 8 years ago I embarked on a major project, the scanning of film negatives dating as far back as the 1970's.
The process was simple, scan the negatives and burn the TIFF files to CD. You can imagine the time involved in such an endeavor. Fast forward to last November. All the CD's were burned on the same burner, a Hewlett Packard external unit.
I decided it was time to bring all those image files into one library, and I decided to use iPhoto. For the most part it went well, however I was concerned because a lot of the burned CD's could not be mounted in the iMac drive. The disks looked excellent, and why not, once they were burned they were placed in protective sleeves only to be brought out once to build a library.
I continued to import all the disks that worked, setting aside the ones that did not read. I acquired another external HP DVD/CD Burner and hooked it to the iMac via USB and began to play with the previously unreadable disks. There were 17 in total. Well 14 of the 17 were mountable and readable in the HP external drive. We could never get the other three to read, so we broke out the negatives and just rescanned them.
I guess the lesson here is to consider the disk brand/quality as well as the device they were burned on. From here on out we intend on creating any archival DVD's on the external HP burner. I figure this is one way to avoid any hassles due to changing hardware. When we get a new computer, we will have the drive that created the archives.