: For a MAC address to be considered "local," the second-least-significant bit of the first octet must be set to 1 . Using 02 (binary 0000 0010 ) satisfies this.
Important: pick a MAC that uses an LAA first octet (examples above). Replace interface and MAC values with your own.
Disable and re-enable your Wi-Fi card if the network fails to pull a new local IP address immediately. : For a MAC address to be considered
A Media Access Control (MAC) address consists of six pairs of hexadecimal digits (octets) separated by colons or hyphens (e.g., 00:1A:2B:3C:4D:5E ).
Fixing "Failed to Change MAC Address" for Wireless Connections Replace interface and MAC values with your own
For those who are determined to use a MAC address that does not follow the LAA rule (for example, one that starts with 24 or 08 ), a more technical workaround exists: .
If you try to set a MAC address where the first octet is invalid (e.g., 02 , 04 , 06 might work, but some addresses fail), Windows or the NIC driver rejects it with "Failed to change MAC address... set the first octet work." Fixing "Failed to Change MAC Address" for Wireless
To ensure the change sticks, format your new MAC address using one of these patterns for the first two digits: (e.g., 02:AA:BB:CC:DD:EE) X6 (e.g., 06:AA:BB:CC:DD:EE) XA (e.g., 0A:AA:BB:CC:DD:EE) XE (e.g., 0E:AA:BB:CC:DD:EE) Other Potential Blockers If the first octet is correct and it still fails:
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