With IOS and Android I had the option to open up a webpage in the browser.
What object do I use for the Mac ?
You could ask Jaffob to port the Open URLs object.
Have you tried to open the URL with the "Run external program" action? I *think* this should work (but I could be wrong...).
I meant the "run external program" action of the Special object, but it's the same, iirc both use the same routine.