The first ID is the same for everyone. To know your board ID
ioreg -l | grep "board-id" | awk -F\" '{print $4}'
Yup, I know that. For me it is Mac-942B59F58194171B. Here are the steps I did:
Reboot into Recovery mode and run csrutil disable
Rebooted and ran:
sudo mount -uw /
sudo /usr/libexec/PlistBuddy -c "Set:Mac-942B59F58194171B:ContinuitySupport true" "/System/Library/Frameworks/IOBluetooth.framework/Versions/A/Resources/SystemParameters.plist"
sudo -E perl -pi -e "s/\Mac-00BE6ED71E35EB86/\Mac-942B59F58194171B/" /System/Library/Extensions/IO80211Family.kext/Contents/PlugIns/AirPortBrcm4360.kext/Contents/MacOS/AirPortBrcm4360
cd /System/Library/Extensions/
sudo touch .
Restarted into Recovery mode and ran csrutil enable
Everything works except Apple Watch Unlock of the machine. I can unlock things in the system prefs with Apple Watch, but not the system.
Update: I went through all of the commands again and it still does not work to unlock the system. I can unlock other things, and all the other Continuity things work but just not system unlock with the Apple Watch. :-(