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It just remembers any peripherals you have already paired with the controller, it's nothing specific to "Apple peripherals". And on the next boot it then shows
by AshamedCaptain 2y ago
It just remembers any peripherals you have already paired with the controller, it's nothing specific to "Apple peripherals". And on the next boot it then shows up as a USB HID device in the pre-OS environment, talking Bluetooth behind the scenes to those same peripherals. I have a (10 year old?) DBT-120 from D-Link which did this, and even Windows had some support for it.
Never seen anything for BLE; my wild guess is that Apple now simply puts a BT stack on their UEFI. Not too far-fetched.
But it doesn't really help the noOS use case, since you still need a BT stack with UI _somewhere_ in order to pair your keyboard for the first time.