@DTS Engineer , I have created a repository containing the code and the certificates I'm using: https://github.com/renanstig/mtlspoc Client cert challenge triggered was indeed printed. After I added the suggested print command: I receive one challenge for the server did receive challenge, method: NSURLAuthenticationMethodServerTrust which works. I also receive one challenge for the client, did receive challenge, method: NSURLAuthenticationMethodClientCertificate, which fails.

Hi Greg Could you please give me a direction of how I can check which pieces of the window intersects with the wall?