The Umat is required for all undergraduate medicine courses in Australia, except for Griffith University (Gold Coast) and James Cook University (Townsville).
Both these university degrees require a very high atar score, due to the people who don't do so well on the umat, still wanting to study undergrad med.
Griffith Uni on requires your atar score. (From memory mid-high 99s)
James Cook Uni requires your atar score, a written application, and an interview (Can't remember weighting of these in the combination)
If you are really keen on studying undergrad med, do the umat. These 2 options can be to fallback if your umat score isn't high enough, and you still want to do undergrad med.