The Mac's system firmware (iBoot) is corrupted or severely out of date.

The "Activate Mac Failed to Create Activation Request" error typically occurs when your Mac is unable to communicate with Apple's activation servers. This can happen due to various reasons, including:

If that fails, try checking your network baseline connection by typing: ping -c 3 ://apple.com Use code with caution.

Select your hard drive (usually Macintosh HD) and click . Use APFS format.

If your Mac is owned by your organization:

: Sometimes a simple reboot clears temporary communication glitches. Hold the power button until the Mac shuts down, then restart and attempt the activation again. Apple Support Community Advanced Solutions for Persistent Errors

Get a second, working Mac and install the free app from the Mac App Store.