OK so I'm new to WordPress and I'm almost too embarrassed to ask this question....
On a Mac how do I change file permission of wp-config.php file to 640. All the examples I can find online refer to PC/Windows users which clearly has a box for a numeric value. I can't see that on a Mac.
So the way I'm trying to do it is to select the file and cmd + I to bring up the file permissions etc.
Thanks in anticipation of your replies