Is anyone else having difficulty installing the latest version on their MAC? My system meets all the requirements however it will not open. If I try to open the software I get the following message: “DraftSight” is an application downloaded from the Internet. Are you sure you want to open it?. After clicking on Open everything closes and nothing happens.  This is very frustrating. I tried downloading the program several time and the same thing keeps happening. I did remove all previous versions of DraftSight. What am I missing?