local development environment

With XAMPP, permission denied for MySQL user with % (all) host access but works for localhost

Key words and phrases: 
Drupal development environment localhost User 'jonasconstructio'@'localhost' : Edit Privileges @% @localhost at percent all hosts
Description & Info: 

For reasons not known to man nor beast, on XAMPP on Mac OS X (and not XAMP but another all in one WAMP stack, but not that name either) will not work with the wildcard availability host name (%). It will work (or anyhow may work for you, it worked for Agaric!) with the @localhost for host name.