Installing Drupal module requires ftp access - macOS localhost I have Drupal 8 running on localhost on macOS Catalina. When I try to install a module, I get prompted to enter ftp credentials (which I don't know). See the following screenshot.

I've seen solutions that suggest this ftp prompt is caused by a permission issue in sites/default folder and can be fixed with chown www-data sites/default or chown apache sites/default for linux but those commands on a mac throw 'chown: www-data: illegal user name' or 'chown: apache: illegal user name' error. What do I need to do to enable installing modules/themes without being prompted for ftp?
EDIT
I'm specifically asking about installing modules by the url method from the admin interface.
Depending on how you are running this locally (native, Docker, etc) this can differ, but I will assume you are using what comes with macOS to run Drupal.
The difference here is Mac does not have a www-data or apache user like Linux does. If you are running with the defaults, the user you are looking for is _www (unless you have modified this in Apache confs).
So, you will want to do:
chown _www (directory)

Technically, this is probably better asked on ServerFault, but I can imagine there are a lot of people trialling or demoing Drupal who just use what is on Mac to do it, and will come across this post finding it helpful.