There are several ways. I am using an Imac with ACI.
Open windows explorer, click on my computer then look for network drives. Mine shows Y which is my Mac hard drive. Check for any other drives. This would be your card reader.
You can copy the pictures to a folder on the Mac and follow the above info and open where to transfered the pictures. If you can not see the mac drive, under Parallels Desktop Edit Virtual Machine make sure under shared applications you have share Mac checked.
Another way is when you plug in the card reader it opens in Windows.
Under USB Controller (Parallels Desktop) check connection and have it read "ask me what to do". That way any USB device will ask it for either Windows or MAC.