OpenSSH on macOS

On your macOS Terminal application, you type the command.

macOS$ `ssh-keygen -t ecdsa`	This command generates your SSH private key and public key of the ECDSA type.
Enter file in which to save the key (/Users/XXXX/.ssh/id_ecdsa):	This inquiry is where your SSH key will be placed. Do not change.
Enter passphrase (empty for no passphrase):	To prevent misuse of your SSH private key, please enter your passphrase in this query. This `passphrase` does not have to be the same as your login password.

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/.ssh/id_ecdsa
  UseKeychain yes
  AddKeysToAgent yes

Replace XXXX with your macOS username. The UseKeychain is for macOS only.

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