GUI methodLogin via RDP and press CTRL+ALT+DEL (FN+CTRL+ALT+DELETE on a MAC OSX) and get the menu to change the password.
CLI methodSamba is all you need:
$ smbpasswd -U myUser -r domain.controller.sample.comIn case you do not have smbpasswd available in OSX should I remind brew can help?
$ brew install sambaHere is one typical error you might get if the password does not meet system necessities:
machine dckr5.krco.com rejected the password change: Error was : Password restriction.