The burner is operating at the new iMac. Play went flawlessly. With the firing, there were problems, as it turned out later due to incorrect operation. (It can not be burned directly to DVD from the USB stick. The file must be cached on the iMac) The knew the Samsung Support not, Apple also because it was not indeed a foreign product. The shipper stirred not at all, although I anmailte him twice. After trying out, I found the solution. Conclusion: Brenner well, support and forwarding bad. Klaus Ziedrich