Thanks for the advice Clint, I tried that but no sign of it in disc utility.
BUT there have been developments. The last card the cameraman gave me was a third party one that takes an SD card and my MBP read that from the internal card reader. He also told me that he’d recently taken his cards into the local sony agent and they’d upgraded them or something, they certainly used to work. Does this make sense to anyone?
cheers
Adam