Titration in chemistry and in apnea is an interesting analogy. In chemical titration we determine the concentration of a substance by adding neutralizer to cause a color shift. In sleep studies, pressure is added and the apnea, hypopnea events are observed until they are extinguished to accepted levels. Titration by pressure rather than drops, LOL.
I am new to Mac but not new to Sleepyhead. When I first tried to get the data off my card onto MAC I had no success. Let me tell you what I was doing, and what I tried, maybe it will work for you?
First off, be sure you are sliding your data card's safety switch to locked before putting into your Mac or any computer. I am using the Mac dowload with the BrokenGL in it's title. I don't know if that matters. My mac is a 13 inch macbook air.
I had been just clicking on the card icon on the right side of the screen, and a box would show up with the image of a data card and it would seem to be loading something but it would end up with a message saying , I can't remember exactly what, but that there was no data or some such.
Then I played around with different buttons and found that if I went to the top of the window and looked at the bar, I'd click on FILE and select IMPORT DATA (using F2 didn't work for me in Mac, none of the short cuts seem to)
Then when I clicked on that, the aforementioned box would appear again, but in a moment or two, one offering the resmed icon would appear and I'd select that yes I wanted to download from that. and from then on it's worked.
Afterwards I have to go to the finder icon on the bottom of mac screen, and go to to Remote Disk choice on left, and then to the gear icon at top of screen and select "eject disk" even though the mac doesn't have a proper eject feature like my laptop did.
Hope this could possibly help you. It is worth a try.
The Manse Hen