This writer was tested with Toast on an iMac. Play of commercial dvd's and recording of personal content worked perfectly. Quality of the newly recorded content was very good. I have purchased the older, large LG burners going back to as early as 2005 and they are dependable, too. Big and small (this Slim Writer is the third I have bought and no problems with the earlier ones), LG does very well in this area of computer work.