My unit is not reading the SD cards anymore, what can I do?

Hi helmutspeyer,

The resource below will provide some information about the SD card slot on your MacBook Pro. Have you tried different SD cards in the SD slot? Does the same SD card work if inserted in a USB card reader? If you make an appointment with an Apple Genius or an Apple Authorized Service Provider, a technician can physically inspect the SD slot for you to determine if a repair is necessary.

About the SD and SDXC card slot

Using Apple Hardware Test

http://www.apple.com/retail/geniusbar/

Take care,