The Optus D736 I think is a Bird D736.
1. Download and run this driver from here.
2. Put a memory card in the phone.
3. Plug in the phone and post a comment here if it works, or if you have to change some settings on the phone. (I have not tested on the bird phone).
You are a genius!
It took a little time to think about it, but eventually both the internal memory AND the memory card popped up in the Finder.
Did I say that you’re a genius.
cool!
Do you have to have a memory card to access the phone through OSX as a mass storage device?
yes you do need a memory card.