How to Disable Private Wi-Fi Mac Addresses on iPhone and iPad

Apple changed the way the iPhone and iPad connect to Wi-Fi networks starting in the iOS 14 and iPadOS 14 updates. If this causes issues with a Wi-Fi network, you can disable it for that network. Here's how.

How Private Wi-Fi Addresses Work

When an iPhone, iPad, or any other WI-Fi enabled device connects to a Wi-Fi network, it sends a unique media access control (MAC) address. This identifies the device to the network.

Traditionally, the MAC address was set at the hardware level and was the same for the lifetime of the device. Every network you connect to received the same MAC address from your device. You could change your MAC address manually on some devices, but few people did.

It's easy to see how this feature could lead to tracking: If you move around a city connecting to different public Wi-Fi access points in coffee shops, airports, and libraries, your device would use the same MAC address to connect to each, enabling an organization operating the Wi-Fi hotspots to track your location movements and network activity over time.

With private Wi-Fi addresses, the iPhone, iPad, and Apple Watch will now provide a different MAC address for each Wi-Fi network they connect to. Each Wi-Fi network you connect to receives a different own MAC address from your device. Your Wi-Fi sessions from different Wi-Fi networks can't be so easily linked to each other anymore.

How Private Wi-Fi Can Cause Problems

Most of the time, you won't notice a problem with private WI-Fi addresses. This option is enabled by default and will "just work." In some cases, it will cause problems with certain networks.

For example, someone might have set up a Wi-Fi network to use MAC address filtering, only allowing certain devices to connect. Your organization might ask you to disable private Wi-Fi addresses in this situation. At home, you might have set up parental controls for each device on your Wi-Fi network---a feature that uses MAC addresses to identify and apply restrictions to devices.

If you're ever having trouble connecting to or accessing the internet on a Wi-Fi network, disabling this option is a fine troubleshooting step that will resolve your problem in some situations.