Failed To Change Mac Address For Wireless Network Connection Set The First Octet Work Jun 2026

: Ensure the second character is 2, 6, A, or E . (Example: 021122334455 ).

. If this is active, it may override third-party tools like Technitium (TMAC) or manual registry changes. 3. Hardware Locking : Ensure the second character is 2, 6, A, or E

If you have set the first octet correctly (e.g., starting with 02 ) and you are still getting an error, here are two common culprits: If this is active, it may override third-party

| Hex | Binary (first 2 bits) | Valid? | Notes | |------|----------------------|--------|-------| | 0x0? | 00 | No | Globally unique, not locally administered | | 0x1? | 01 | No | Multicast + global | | 0x2? | 10 | | ✅ Locally administered, unicast | | 0x3? | 11 | No | Multicast + local | | 0x4? | 00 | No | Global | | 0x5? | 01 | No | Multicast + global | | 0x6? | 10 | Yes | ✅ Locally administered, unicast | | 0x7? | 11 | No | Multicast + local | | 0x8? | 00 | No | Global | | 0x9? | 01 | No | Multicast + global | | 0xA? | 10 | Yes | ✅ Locally administered, unicast | | 0xB? | 11 | No | Multicast + local | | 0xC? | 00 | No | Global | | 0xD? | 01 | No | Multicast + global | | 0xE? | 10 | Yes | ✅ Locally administered, unicast | | 0xF? | 11 | No | Multicast + local | unicast | | 0xB?