Renewing your IP address often fixes minor glitches and connectivity issues. Your Mac will ask your DHCP server, often your Wi-Fi router, a new IP address and it will connect using the same or a new one, depending on the details provided by your router.
To find this configuration, Click on the icon “Apple” in the upper right corner of the menu bar and select “System preferences”.
Click on “Red” in the System Preferences window.
in the upper right corner of the menu bar and select “Advanced”. This works with wired connections (Ethernet) and wireless (Wi-Fi).
The next screen should show the Wi-Fi tab by default. Choose “TCP / IP” instead, just right.
Click the button “in the upper right corner of the menu bar and select” and then click “To accept” in the upper right corner of the menu bar and select. By clicking on this button, instructs your Mac to get new routing information from the DHCP server.
Resetting this could improve your Mac's connectivity, especially if you have recently changed your router settings.
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