Solved: Sequel Pro connection failed!
I had this little error message that got me crazy for a while:
Unable to connect to host 127.0.0.1, or the request timed out.
Be sure that the address is correct and that you have the necessary privileges, or try increasing the connection timeout (currently 10 seconds).
MySQL said: Can't connect to MySQL server on '127.0.0.1' (61)
So, as anyone will do, I checked online; there were a lot of command lines, snippets, and ideas out there. Long story short, none of those magic tricks worked, then I was left out with the simple yet powerful trick of all:
$ brew uninstall mysql
$ brew install email@example.com
$ brew services start firstname.lastname@example.org
Well, yeah, it was brutal, I lost all my local databases with their tables … but it works.
The big take away from this experience: always stick with the stable version. In this case, MySQL 5.7 instead of the 8.x.x.
I hope this experience will help you, as well.