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#Asus usb bt400 not working Bluetooth#
So to support Bluetooth in the BIOS, you'll need a Bluetooth device that supports HID Proxy. To make sure this sticks around, you can use a firmware injecting kext like that found on the IntelBluetoothFirmware repo (opens new window). So if you rebooted from Windows into macOS, the firmware on the card may have stuck on allowing you temporary Bluetooth support on your card. Wi-Fi, on the other hand, is quite a bit more complicated as there needs to be explicit support in the IO80211Family kext for the device, so only Broadcom/Atheros cards have any chance of working. Bluetooth is actually quite simple in how it interacts with the system and thanks to being generally run off of USB, generic devices can easily hook into IOKit and act semi-natively(usually with the loss of Handoff, AirDrop, etc). Well, it's a bit complicated and involves looking at IOkit and how it handles different devices. This means that you'll need to either solder new headers for Bluetooth on your motherboard or route a USB cable to an existing port # So why does Bluetooth work on my Intel card Well I was orginally going to manually find every supported model but user MarkVillacampa (opens new window) has done a great job already so I'll link to his findingsĪsus and Lenovo note: On 7th gen and newer laptop chipsets, Bluetooth has been intergrated into the PCH and these OEMS don't have any USB rails wired off of their A/E slots. So with Bluetooth in macOS, it can become quite confusing on what actually is supported and what's not.