I have a mid-2009 13" MacBook Pro and suddenly my wifi card has disappeared Both Hardware profile and Network option doesn't show a wifi card anymore. So, I've found a Clamshell Service Diagnostic (CSD) installer to help me to make a diagnostic of the problem without opening my computer. When I try to install the CSD utility into a Transcend USB key (8Gb) it seems that the process runs well BUT after it's finished the USB key is intact ! I've already tried to partition the key with MBR and GUID tables but no luck. Here are some screenshots : Does anyone have access to Apple Global Service Exchange (GSX) in order to search some help for me, please ? TIA, M.