Hello! I suffer already half a year. There is LaCie USB3.0 ExpressCard/34 and MacBook Pro 17" Late 2011 (MD311). I can't force to work in any way the card under OS X with USB3.0 speed (W/R 35/39 MB/s max!!!) On the same laptop under Windows 7 BootCamp with Renesas drivers, the card perfectly clings HDD and gives out the decent speed of copying.