Advanced network troubleshooting on macOS

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1. Right click on WiFi icon  

3. Go to "Advanced"

4. select "TCP/IP" tab, make sure "using "DHCP" is selected

5. Select "DNS" tab, using the + button add "8.8.8.8" and "8.8.4.4" to you DNS Server list

6. Select "Proxy" tab, make sure nothing is checked, like in the pic

2. Select “Open Network Preferences”

8. Click "Apply"

7. Click "OK"