On your macOS Terminal application, you execute

ssh-keygen -t ecdsa

. This command generates your SSH private key and public key of the ECDSA type. Your SSH public key is $HOME/.ssh/id_ecdsa.pub. Then you register the generated key in your macOS keychain application

ssh-add -K $HOME/.ssh/id_ecdsa

.

Create $HOME/.ssh/config file like the following:

Host *
  ForwardAgent yes
  ForwardX11 yes
  ForwardX11Trusted yes
  IdentityFile /Users/XXXX/id_ecdsa
  UseKeychain yes
  AddKeysToAgent yes

Replace “XXXX” with your macOS username.