The reader, cable and compact flash card worked perfectly on my 27-inch iMac running 10.8.3, but the compact flash card cant be read after I installed 10.8.4. The reader, cable and compact flash card works perfectly on my 24-inch iMac running an older OS. The only thing that has changed is upgrading from 10.8.3 to 10.8.4. Is anyone else experiencing this problem?