I have a T400 with intel 5100 wifi card and now I want to install mac os on my laptop.
problem is that mac os does not detect the 5100 series of wifi card and I want to know whether it is possible to replace the current 5100 model with a older series?
One recommendation would be to visit the Lenovo support siteand look up the part list for your particular system (in this case a T400) and review the list wifi cards listed as applicable.
Lenovo restricts the wireless cards to Lenovo branded units certified to work with the machine. This is done through a whitelist in the system BIOS. Based on BIOS (version 3.14-1.06) T500/W500 BIOS and contained the following whitelist table.