Spotify everywhere but my Mac?

[CierraMist]

A few weeks ago, I posted about an issue I was having with the things I listen to not appearing on Facebook. I've continued looking through forums, trying to find a solution and I discovered that through mobile, it would post what station I was listening to on Facebook. I also discovered that on my Windows computer, it would post what I was listening to on Facebook, but for some reason it won't post through my Mac! I've made sure that the "Show what I listen to on Facebook" is checked, that I'm not in a Private Session and everything else. I just can't seem to figure out why using Spotify everywhere else will post! Help?