I've been having this ongoing issue I can't figure out. I have a 2018 Mac mini. Now with the Apple Watch it auto unlocks. For a day or two and then the watch will no longer unlock the Mac. And also the Mac stops seeing my phone. You know how in some apps such as mail you can tell it to import a photo from your phone and then you can take a picture of something and it will transfer to mail, that stops too. A reboot of the mini will fix the issues for a day or two and then it stops working again. Any ideas?