I just received a Panasonic HVX200 with some P2 cards but no reader. Does anyone know if the new Lexar Multi-card 25-in1 USB 3.0 Reader can be used to download the P2 cards on to my Mac?
Nothing but a dedicated P2 card reader can read those cards. You can use your HVX200 as a card reader by plugging it in through USB and using "USB Device" mode.