I suddenly have trouble using ADB to connect to one of my phone running Nougat. Like How to Fix ADB Unauthorized Error's author, I do not have Revoke USB Debugging Authorizations option anywhere. Unlike the author, I still see an authorized device in my adb even after I boot into the recovery.
I also followed Missing USB revocation on Android with Nethunter with zero luck.
I tried to connect the same mobile device (Samsung S6) to another mac (never connected before) and encountered the identical issue...