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Move Sierra bluetooth drivers to High Sierra (downgrade)


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Hello everyone,
I would like to know how to transfer (downgrade) the bluetooth module from Sierra to High Sierra.
On my iMac 2011, equipped with a bluetooth 4 dongle, I have three partitions: one with Sierra, one with High Sierra and one with Catalina (patch).
There is no way or program to connect High Sierra with the iPhone via bluetooth, while with Sierra and Catalina there are no problems.
After many unsuccessful attempts (I tried all the methods found on Google), I decided to try to transfer the Sierra bluetooth drivers to High Sierra, but I don't know which files should be moved.
Can anyone more experienced than me help me?

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