Renewing your IP address often resolves minor glitches and connectivity issues. Your Mac will ask your DHCP server, often your Wi-Fi router, for a new IP address and connect to the same or a new one, depending on the details your router provides.
To find these settings, click on the “Apple”
Click “Network” in the System Preferences window.
Choose the correct network and click on the “Advanced” button. This works with both wired (Ethernet) and wireless (Wi-Fi) connections.
The next screen should be the Wi-Fi tab by default. Instead, choose “TCP / IP” to the right of it.
Click the “Renew DHCP License” button and then click “OK” once the renewal is complete. Clicking this button instructs your Mac to fetch new routing information from the DHCP server.
Resetting this can improve your Mac’s connectivity, especially if you’ve recently changed router settings.