Bluetooth on OSX doesn't work on threads other than the main GUI thread

Under OSX, creating a bluetooth discovery agent and/or socket in anything other than the main GUI thread does not work.
All the serviceDiscovered/finished/canceled/error and readyRead/connected/disconnected signals never reach the slots they're connected to.
I've been trying to move the IO to a separate thread to decouple from the GUI, but both creating the objects in the new thread and creating them in the main thread and then using moveToThread result in the same problem, the signals never get emitted or reach their intended slot.
I've experienced this trying to connect to a simple SPP serial device.
It probably has to do with the underlying objective-C component not inheriting from qObject.