Steps:

For Windows 10/11:

Verify the Network Is Broadcasting:

• Restart the router.
• Check if other devices can see the network.

Manually Add the Network:

• Open Settings > Network & Internet > Wi-Fi.
• Click Manage known networks > Add a new network, then enter the SSID and password.

Update Wi-Fi Driver:

• Use Device Manager to update the driver for your Wi-Fi adapter.

For macOS:

Verify the Network Is Broadcasting:

• Restart the router.
• Confirm visibility on other devices.

Manually Add the Network:

• Go to System Preferences > Network.
• Click Advanced, then add the network manually by entering the SSID and password.

Reset Wi-Fi Preferences:

• Open Finder, press Cmd + Shift + G, and type /Library/Preferences/SystemConfiguration/.
• Delete com.apple.airport.preferences.plist and restart your Mac.