How to "forget" the network (APU WiFi) from your list of preferred networks: Mac

Step 1: Click the Apple menu then select System Preferences

Step 2: When the System Preferences screen appears, click Network

Step 3: In this new window, make sure Wi-Fi is highlighted and click Advanced at the bottom right

Step 4: In this window, scroll until you find APUWIFI, click it, then click the "-" sign, then click OK

Step 5: When you get back to this window, click Apply, then RESTART your laptop. 

Step 6: Once your laptop is restarted, you can re-connect to APUWIFI, be prepared to enter your APU credentials (NetID and password)