When it’s an Activation Lock / Apple ID ownership problem
If you are stuck on the "Activate Mac" screen, try these solutions in order: activate mac failed to create activation request
Suggested resources to link in the blog post When it’s an Activation Lock / Apple ID
The error “failed to create activation request” means the T2 chip either cannot build the encrypted request packet or cannot send/receive a valid response from Apple. activate mac failed to create activation request