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)