To burn a Blu-Ray one must install Toast 11 HD and Blu-ray Plugin - ESD. This works on my Mac Pro under 10.6.8 but not under 10.8.4. On their website only 10.5 and 10.6 is mentioned. I'll try Leawo Blu Ray Creator now. I hope it'll work from FCP X. But first I need to buy a FW800 to Thunderbolt. Don't hesitate to mention it if you've another solution. Paul Moortgat