from terminal, run "lspci -nn" and paste output here. Most Dell Latitude I work with has Intel Lan, but I've seen a few that are Broadcom. The output above will determine what it has. Maybe you're referring to the wireless. If it's Intel, it's not supported and will need to be replaced. If you have bluetooth, that requires patched kext. SD card reader needs voodooSDHC Some wireless card (atheros) require patched kext