Save the files and reboot, re-enable Bluetooth.They're respectively LTK, ERand, IRK, Address and EDIV from the reg file, nothing needs to be endian swapped except for the EDIV (as an example, "EDIV"=dword:000080b4 in the reg file means the macOS EDIV is b480) and the Address (as an example, "Address"=hex(b):46,78,f9,ba,1a,db,00,00 in the reg file means the macOS Address is db1abaf9 7846). LTK, RAND, IRK, address and EDIV need to be changed. Replace the MAC of the device you're dealing with with the new one, and expand that dictionary. Expand SMPDistributionKeys, and expand again the dictionary named after the bluetooth adapter MAC, you'll find one sub-dictionary for each BLE device, named after their MACs. Modify /Library/Preferences/ replacing all instances of the previous MAC address of the BLE device with the new one, and also modify /private/var/root/Library/Preferences/ist (up to Sierra) or /private/var/root/Library/Preferences/ (High Sierra onwards) as follows:.
Export HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BTHPORT\Parameters\Keys\ to a reg file and reboot into macOS.
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