Multiple Website setup

Hi! I just installing MODX into my local MAMP hosting. I am looking to migrate my WordPress multisite setup into my MODX site, does MODX have any settings to enable a multisite setup similar to WordPress multisite, where multiple websites will use a single shared core.

With MODX you can use Contexts:

Hi! I also discovered context, but I aren’t sure if each of the context could have their own administrator, dashboard, subdomain, plugins and etc?

Context (and different subdomains) can be restricted on usergroup base.

Some extras can be restricted to usergroups.

So each context could have their own subdomain, and operate like a normal separated websites?

Yes, this is possible i.e. with SmartRouting in the frontend. In the backend you have to use the ACL configuration to restrict the visible and editable contexts.