The "Failed to create activation request" error typically occurs during a factory reset or after a software update when the Mac cannot communicate with Apple's activation servers. Immediate Solutions
Ensure your Mac is connected to a stable internet connection. Restart your router or try connecting to a different network to rule out any connectivity issues. activate mac failed to create activation request
Your final options:
rm -rf /var/db/ActivationLockCache/
rm -rf /var/db/ActivationLockData/