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softeky said:I'm running 10.12.6 (Sierra) but Security and Privacy says: "Unlock your Mac not supported with your Apple Watch." "Update your Mac's software to allow your Apple Watch to unlock your Mac".
The watch is a non-LTE, series 3, running iOS 4.0 (also up to date).
I don't see an update to Sierra for this feature on Series 3 and I am going to wait on High-Sierra until its issues are better solved.