I honestly have no idea what shipping time to Australia would be - my first order to go there happened this morning, so presumably I’ll know before long.
If the camera is capturing at high-res on the Mac, you should be able to get it to work. You might need to capture images closer to the center than shown in the calibration video, and angled slightly toward the camera if it’s a strong fish-eye. In the video it says the image should be parallel to the camera lens, but if the lens is a really strong fisheye, breaking this rule sometimes helps.
Take a bunch of captures in succession, moving the calibration card a little bit each time, and take notice of which things you do improve the capture score and which make it worse. I’ve been able to use a 170 degree myself - it was a little harder to get good scores, but was still possible.