How to upgrade Windows 10 to Windows 11 on Mac via Boot Camp?

Microsoft’s official stance is that TPM 2.0 is mandatory, but for Intel Macs, you can sometimes bypass this requirement by editing the registry during installation or using modified ISO files.

Step-by-step upgrade Windows 10 Windows 11 on Mac:
1. Check for Windows Updates: 
    Ensure your Windows 10 is fully up to date (which you already did).
2. Download Windows 11 ISO or Media Creation Tool: 
    Use the official Microsoft Windows 11 Download page to get the ISO file.
3. Create a Bootable USB Drive:
    Use tools or the Windows Media Creation Tool to create a bootable USB installer.
4. Modify ISO for Unsupported Hardware
Since Macs lack TPM 2.0, you need to bypass the check:
    Use a Windows PC to modify the ISO, adding a registry key to skip TPM 2.0 check.
    Alternatively, during installation, press Shift+F10 to open Command Prompt and run commands to disable the TPM check.
5. Upgrade via ISO or In-Place Upgrade: 
    You can attempt an in-place upgrade by mounting the ISO and running setup.exe.
    Follow the prompts, choose to keep personal files and apps when asked.
6. Run the Windows 11 Setup: 
    When prompted, select "Keep personal files and apps" to retain your data and applications.

After upgrading, check Windows Update for driver updates. You might need to manually install Boot Camp drivers for Windows 11. Your MacBook Air's hardware is capable of running Windows 11, but performance may vary depending on workload.