You may need to turn off (or un-pair) Bluetooth accessories that are currently using your internal Bluetooth controller, as they can prevent the dongle from being detected by the Continuity Activation Tool.
The end bit was key. turning off the bluetooth devices and then bluetooth, then firing it back up finally did it for me.
I've had to buy a dongle for my mac. Getting it to work is another thing, 'continuity tool' did all the command line stuff needed to switch my mac over from the internal BT chip to the dongle. Asus BT400 works a treat.
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Espruino
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I did this in conjunction with https://github.com/dokterdok/Continuity-Activation-Tool/
The end bit was key. turning off the bluetooth devices and then bluetooth, then firing it back up finally did it for me.