Dawn Macbook Pro Atik 383L+ readout problem

[was]

I installed the latest Dawn on MAC Catalina on MacBook Pro and successfully connected to Atik 383L+.
The images are strangely distorted, tilted and overlaid, it seems the CCD readout is incorrect.
Could it have to do with the Thunderbird to USB connector which MacBook uses?
Or something to do with the Mac driver which the documentation says something about having to deinstall (I did not).


For comparison, Capture on Windows works fine, so it is not a camera issue. 

[was]

I mean Dusk not Dawn of course!