Windows 10/11, macOS, and modern Linux distributions have built-in MAC randomization for Wi-Fi scanning. If you manually try to change your MAC address while the OS is also randomizing it, you may get validation errors because the OS temporarily uses reserved or invalid address ranges.
The error "failed to change mac address for wireless network connection set the first octet work" appears under these conditions: Windows 10/11, macOS, and modern Linux distributions have
Wait 5 seconds, right-click again, and select . Ensure the first two digits are "02" 02:00:00:00:00:01
. This corresponds to the following patterns for the first octet: Super User (e.g., 02, 12, 22...) (e.g., 06, 16, 26...) (e.g., 0A, 1A, 2A...) (e.g., 0E, 1E, 2E...) Setting the first octet to is the most common recommendation to resolve this error. Technitium Blog How to Apply the Fix Open your MAC changer tool Windows Device Manager Manually enter a 12-digit hexadecimal address. Ensure the first two digits are "02" 02:00:00:00:00:01 Restart the adapter by disabling and then re-enabling it in the Network and Sharing Center for the change to stick. Technitium Blog Alternative: Built-in Randomization If you are trying to spoof your address for privacy, Windows 10 and 11 and select .
Modern Windows and macOS drivers are increasingly restrictive. Even if you use third-party software, the WiFi card firmware might override your request. On Windows: