Hi all, I was trying to set up my Mac as a hot spot, but I am unable to. I went to System Preferences/Sharing. As you can see by the image below, there is no port selection on the right side "WiFi" so that computers using wifi can see my Mac as a hotspot. As the message states I cannot select "Internet Sharing" on the left side because of this. (This is how it seems it is supposed to work.) I have not found anything to help me with this, what am I doing wrong?