T450-Opencore-12/Utilities/DW1820A

Note from i3p9:

I've updated the kexts needed to run DW1820A properly. Put all the kexts from this folder, add their entries in config.plist -> Kernel -> Add.

Then add an entry in DeviceProperties -> Add as follows: PciRoot(0x0)/Pci(0x1C,0x1)/Pci(0x0,0x0):

• AAPL,slot-name (Type String): WLAN
• compatible (Type String): pci14e4,4331
• device_type (Type String): Airport Extreme
• layout-id (Type Data 4 Bytes): 20000000 (This essentially sets brcmfx-driver to 2 (AirPortBrcmNIC)
• model (Type String): DW1820A (BCM4350) 802.11ac Wireless
• name (Type String): Airport
• pci-aspm-default (Type Number): 0

Like this screenshot here:

Note: PciRoot location depends on your Laptop. This is specific for T450s. And the compatible depends on the card itself. I'm using DW1820A 00JT494 myself.