sudo vi /etc/apache2/httpd.conf で以下の設定を最後に追加
Alias /phpmyadmin /usr/local/share/phpmyadmin
<Directory /usr/local/share/phpmyadmin/>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
<IfModule mod_authz_core.c>
Require all granted
</IfModule>
<IfModule !mod_authz_core.c>
Order allow,deny
Allow from all
</IfModule>
</Directory>
sudo apachectl restart
参考:https://soarcode.jp/posts/55