[CA] [CA11] Unable to update Axiom from SD

[argus]

I reported in thread A80440 RCR-SDUSB Operation with Navionics+ Chart Card - http://forum.raymarine.com/showthread.php?tid=5952; that I was having problems with the microSD cards with the bundled charts that came with my Axiom 12 and Axiom 7. The cards are now not recognized by either Axiom or a PC computer. I am also having a problem with the Navionics 906P+ U.S. Southeast to Bahamas Platinum+ Charts microSD Card not being recognized by Axiom on bootup. I purchased a new Navionics+ card that is working without problem. When I put the Navionics 906P+ back into the remote reader the problems reoccur. Navionics has agreed to repair the 906P+ card under warranty.

I now wondering, if I also am having problems with these 3 cards because I attempted to update them using a MAC computer?