The Documentation on the Moodle website for a Mac does not work.
https://docs.moodle.org/37/en/install_on_OS_X
When I show grants in the MySQL database, there is no new users privileges granted. Also, I seen an error that indicates possibly a mysqi library is also needed that is not included in the documentation :
Error: Database connection failed
It is possible that the database is overloaded or otherwise not running properly.
The site administrator should also check that the database details have been correctly specified in config.php
Warning: mysqli::__construct(): (HY000/2002): No such file or directory in /Users/tiffanyfischer/Sites/LMS/moodle/lib/dml/mysqli_native_moodle_database.php on line 79
~Blessings