Do you have an access.log and error.log in possibly /var/log/apache2/ ?

Mostly for Chuma's benefit:

The ErrorLog directive (in httpd.conf) specifies the pathname of the error log.

I haven't changed the default. Here's mine (including the preceding, important comments re <VirtualHost>):

#
# ErrorLog: The location of the error log file.
# If you do not specify an ErrorLog directive within a <VirtualHost>
# container, error messages relating to that virtual host will be
# logged here.  If you *do* define an error logfile for a <VirtualHost
+>
# container, that host's errors will be logged there and not here.
#
ErrorLog "/private/var/log/apache2/error_log"
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The CustomLog directive specifies the pathname of the access log. It has much the same comments re <VirtualHost>. Mine's called access_log and is in the same directory as error_log.

For poj:

You were effectively correct with the location: /var is a symlink to /private/var.

— Ken

The apache config should contain something like this:

<Directory "/Library/WebServer/CGI-Executables">
    AllowOverride None
    Options +ExecCGI
    Require all granted
</Directory>
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