Intermittent Wi-Fi connection issues on Mac

It may be possible that the router has barred or blocked your Mac's MAC address (Media Access Control) on your router. The MAC address is a unique identifier assigned to each network interface card (NIC) in a device. By blocking a specific MAC address on the router, you can prevent that device from connecting to your Wi-Fi network.

The process of blocking/unblocking a MAC address varies depending on the router's manufacturer and model. Here are general steps to block a MAC address on most routers:

1. Open a web browser on a device connected to the router's network and enter the router's IP address in the address bar. You can usually find the router's IP address on the bottom of the router or in the router's manual.
2. Enter the router's username and password when prompted. If you haven't changed them, the default credentials are often found on the router or in the router's manual.
3. The location of these settings may vary depending on the router's interface. Look for a section related to "MAC filtering," "Access Control," "Wireless Security," or similar.
4. In the MAC filtering or access control settings, there should be an option to add a MAC address to the blocked list or delete a Mac Address from the blocked list. Enter the MAC address of the device you want to block/unblock and save the changes.
5. Apply the changes and restart the router: Once you have removed/added the MAC address to the blocked list, save the settings and apply the changes. Some routers may require a restart for the changes to take effect.

After blocking the MAC address on the router, the device with the blocked MAC address will no longer be able to connect to the Wi-Fi network. Keep in mind that MAC address blocking is not foolproof, as MAC addresses can be spoofed or changed on some devices. For enhanced security, it's recommended to use additional authentication methods such as strong Wi-Fi passwords and encryption protocols.

Possible Fixes:

1. Disable Private Wi-Fi Address: for both iOS and macOS
   1. Go to Settings > Wi-Fi, tap on your work network, and turn off Private Wi-Fi Address.
   2. The router may have whitelisted a specific MAC address; make sure the phone is using the correct one.
2. Turn Off Wi-Fi Assist: for iOS devices
   1. Go to Settings > Cellular > Wi-Fi Assist and toggle it off.
   2. Sometimes, this setting can interfere with connecting to hidden networks.

See the pic below for a Mac

Connecting to Wifi is the first part, and then getting connected to the Internet is the second

1. If you are connected to a Wifi, it doesn't necessarily mean you are connected to the internet. If you are not connected to wifi could be a problem of iPhone settings or Router/Modem Settings
2. If you are not connected to the internet is the issue of the Router / Modem Settings. Contact your ISP immediately

Internet Over WiFI: Contact your ISP (Internet Service Provider), the agency that provided the Internet Service to your Modem/Router.

Recommended settings for Wi-Fi routers and access points ...

You have to try different devices. That particular device has Rotating Private WiFi Address enabled

See the Pic below for the complete explanation (There are three scenarios provided below)

The same is true for iPad and Mac, too.

The Private Wi-Fi Address feature on an iPhone or Mac enhances your privacy when connecting to Wi-Fi networks. Instead of using your device's fixed, global MAC address (a unique identifier for your device's Wi-Fi hardware), your iPhone generates a different random MAC address for each Wi-Fi network.

Private WiFi Address (MAC Address) has three Options:

• Off: Disables the use of a private Wi-Fi address. Your device will use its default (permanent) MAC address when connecting to Wi-Fi networks.
• Fixed: Your device uses one consistent private MAC address for a particular Wi-Fi network. Once your device generates this private MAC address, it will reuse the same one for that network every time you connect.
• Rotating: Your device frequently changes its private MAC address when connecting to the same Wi-Fi network, providing the highest level of privacy. This makes it nearly impossible for the network or observers to track your device over time.