Create SSH Key On Mac

First, open the terminal, and run this command:

ssh-keygen -o -t rsa -b 2048 -C "NAME"

# NAME sample : GIT_SERVICE_NAME__SUBDOMAIN.DOMAIN.COM__USER_EMAIL

After Creating check the SSH config changes, and run this:

nano ~/.ssh/config

And SSH key scope must be added:

# --- Terminal Generated ---
Host id_rsa_GIT_SERVICE_NAME__SUBDOMAIN.DOMAIN.COM__USER_EMAIL
    HostName GIT_SERVICE_NAME
    User USER_EMAIL
    PreferredAuthentications publickey
    IdentityFile /Users/USERNAME/.ssh/id_rsa_GIT_SITE_NAME__SUBDOMAIN.DOMAIN.COM__USER_EMAIL
    UseKeychain yes
    AddKeysToAgent yes
# --------------------------

After that run these commands:

eval $(ssh-agent -s)\nssh-add
~/.ssh/id_rsa_GIT_SERVICE_NAME__SUBDOMAIN.DOMAIN.COM__USER_EMAIL

ssh-add -K ~/.ssh/id_rsa_GIT_SERVICE_NAME__SUBDOMAIN.DOMAIN.COM__USER_EMAIL

Enjoy.