I have all the new betas installed. I had the unlock Mac option with Apple Watch working great and was loving the new beta. I realized I haven't changed my iCloud password for a while so I went ahead and changed it. This logged me out of iCloud of course and i logged back into everything with my new password. I noticed the unlock Mac with Apple Watch stopped working. I went to the settings on my Mac to see if it was still checked off and the option does not show at all. I double checked to make sure handoff was still enabled and it was. I at a loss as to what to try next. How come the unlock with watch option simply disappeared and how do I get it back? Has anybody else experienced this?