VistaCam 1101 Cameras not loading on Macbook

I just installed 5 VistaCam 1101 cameras to my system. The thumbnail pics show up but when I select a camera to view live, I get error messages and it won’t load. I tried the same thing on an HP computer and it worked just fine. Anyone know how to resolve this issue? Vera support has been less than helpful at this point telling me there is no issue.