I tried using the DJI Assistant 2 to calibrate my Mavic Pro on both my MAC and PC. Each time I tried, a white screen appeared instead of the dots used to calibrate.  

  

  

After reading a few posts, I found one that suggested adjusting the screen resolution down, in my case from 1080 to 720; it worked!   Thanks!

  

Glad to hear that  you've figured it out, enjoy it and hope you have a good time on flying.