www.wysiwygwebbuilder.com

I am supposed to use the font open Sans Light for a customer. This also works with all browsers except MAC OS systems. The font Times New Romans is always displayed there. Anyone know how I can set the font for Apple MAC OS systems.

Thanks so much

From my understanding Open Sans isn't compatible or used with IOS operating systems. So to have it display you w need to use or call it from Google API. SEE The following on using.
https://www.wysiwygwebbuilder.com/webfonts.html

Did you use Google Fonts?
If yes, then what is the URL so I can see if there is an error?