I have read about this issue in other posts but it looks like there is no real resolution: http://forum.webflow.com/t/why-doesnt-lightbox-work-in-safari/16291
Client noticed light boxes are loading opaque background only in Safari (on Mac). I tested via https://spoon.net/browsers and experienced the same issues.
I will try to posts a link to client site later.
Does anyone have a fix?