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This isn't actually the case. Apple supports 3rd party trackers - see https://mfi.apple.com/ https://mfi.apple.com/ and https://developer.apple.com/find-my/ htt

• alibarber 2y ago
  Yes, this is exactly what I’m saying. Apple officially supports third party trackers, who’s manufactures are issued, by apple as a part of their MFI programs, keys with which these third party devices must use to sign their pairing requests to the users apple account. Perhaps these $5 devices do indeed include legitimate keys from apple to use from this, perhaps they have copied one from another device.