Thanks for the useful information. (If somebody sends me a MAC, I don’t know why, I’d like that very much.)
I’m starting from scratch so there is nothing to backup. For WP my computer is still a green field. Does that simplify the procedure in any way?
Regarding the procedure you have given, I assume that the “Backup” steps are not necessary (I’ve nothing to back up). Also, there is nothing to restore. So, the part about installing XAMPP is probably not right for my situation as written.
Finally, where does a brand new, empty of data MYSQL data base come from?