Hi,
I don't think it's anything your doing wrong. It seems that some Mac users have some problems with auctiva software.
Check out the other forums on here. I found this post all about mac users and the problems they have been facing with their MAC's and Auctiva. They offer advice and help for each other.
https://community.auctiva.com/eve/forums/a/tpc/f/838...541024051#4541024051
Good luck,
Carol.