I totally agree with Russell here. I used my iMac (mid 2011), OSX 10.8.1 DVDAE for Mac and the backup option with MakeMKV, and was able to extract Chopin's Piano Concerto no. 2 in 96 kHz, 24 bits (from Naxos) with total success. I encountered the same problems as Russell initially and was able to solve them. DVDAE did not recognize any of the files MakeMKV had decrypted until I asked it to loot at the directory instead of the files, and suddenly it worked perfectly.
I haven't as yet compared the two versions, the computer and the Blu-Ray (because mostly I do not really like that concerto and did not wish to waste time on it.
Oh and I used a Samsung portable BD Writer SE-506, apparently without problem (strange one, first time I see a USB Y connector).
Lord Grumble (I grumble a lot for nothing but not in this case).