PCB View not congruent with Breadboard View

is gerberv only for windows?

Gerbv not Gerberv. I think it’s Linux and Win.

There are online ones, but I don’t know much about them.
http://gerblook.org/pcb/TDDAmLYGorUtXnieQ3GwCH

Thanks, I found MCN Gerber Viewer which worked for me on my mac.