Further to recent additional findings, BCM4350-based cards such as the DW1820A are now fully supported. Follow our guide, inject the appropriate properties into DSDT or Clover configuration and off you go. No need to patch kexts or anything of the sort. The closest it comes to working OOB...
Full 802.11ac speed (867Mbps) + BT 4.1 all supported!
These cards come as a great supplement to existing M.2 supported models such as DW1560 and DW1830.