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Apple’s Private Wi-Fi Address feature, recently introduced in macOS Sequoia and updated for iOS 18 and iPadOS 18, could cause connectivity issues for CU Boulder Wi-Fi networks. The Private Wi-Fi Address setting should be set to "off.” The same is true if you update your iWatch or VisionPro.

The Private Wi-Fi Address feature provides users a higher level of privacy by periodically changing a device’s locally administered hardware address, known as a MAC address. Frequently changing your MAC address on a network makes it harder to track your device and its activity over time. This is why it is advisable to set your Private Wi-Fi Address to “rotating” for public networks like coffee shops or airports.

Since the CU Boulder Wi-Fi networks, UCB Wireless and UCB Guest, require users to register their device, rotating or changing your MAC address will force the device to go through the network registration process each time the MAC address changes. This could result in your devices frequently dropping their network connection. This is why for UCB Wireless and UCB Guest, and even eduroam, OIT strongly recommends turning the Private Wi-Fi Address setting to “off” on these networks.

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Because Private Wi-Fi Address is a per-network setting, OIT's recommendations are only for CU Boulder networks. For all campus Wi-Fi users with an IdentiKey, we continue to recommend that you connect to UCB Wireless rather than UCB Guest since UCB Guest restricts access to certain campus resources. As OIT investigates the network performance impacts of Private Wi-Fi Address, OIT also recommends that eduroam users turn off Private Wi-Fi Address at this time for better stability.

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