Just adding onto the post above - this is what I got from my chat with them:
Thanks for getting in touch with us at Western.
The university assesses applicants on academic rank and UCAT to offer a place into the MMIs. There is no specific UCAT threshold as many people ask each year, however, each university selects questions in the UCAT that they would like applicants to answer correctly and select them from there.
Following this, interviews are conducted and marked.
The admission team then assess applicants on their MMI and UCAT score (whilst its not exactly 50:50, it is close with greater emphasis put on MMI scores but UCAT being used as a further defining criteria for applicants who are equal in MMI score and Academic Rank/ATAR).
So essentially, UCAT and MMI are not equal but are assessed equally when applicants rank the same in certain components
I then asked about whether the selected questions meant actual questions or whether they meant sections (Ex. VR, AR, etc.) and they responded:
Great, I am glad to hear. It is such a convoluted system and can understand how confusing it is.
Essentially, the universities are able to view the UACT (previously UMAT) exams and assess each section and select questions that are more applicable to the cohort of students they would like. E.g - one year may require more quantitative reasoning questions, another year may require more verbal reasoning etc... It changes every year and we have no idea what they want in advance.
Then asked for further clarification bc it sounded like in the first msg that maybe ATAR was competitive and they said:
That's okay, I'm more than happy to help.
Essentially the academic rank and ucat is used as a hurdle at first to get offered a spot in the MMIs. After the MMIs are marked, if there are many students tied, they will then assess them based on their UCAT scores/questions they got correct then their academic rank