The most successful way to add the QU-WiFi to a newer mac computer is within system settings.
Open System Preferences (command + the spacebar and type "system settings")
On the right side navigate to the Wi-Fi section and click. then on the main window navigate down to the "Other" section and scroll to the bottom of that list and click "other"
Select WPA-2 Enterprise from the drop-down menu and fill out the Wi-Fi name, it must be exactly QU-WiFi with capitals, then fill out the username and password for your Queens account. You do not need the @queens.edu part of the username.