;)

docker-compose -v ; sudo rm /usr/local/bin/docker-compose ; sudo curl -sL https://github.com/docker/compose/releases/download/$(curl -is https://github.com/docker/compose/releases/latest|grep Location|awk -F/ '{print $NF}'|grep -Po '[1-9\.]+')/docker-compose-Linux-x86_64 -o /usr/local/bin/docker-compose ; sudo chmod +x /usr/local/bin/docker-compose ; docker-compose -v

Solution 1 (recommended)

Apple updated its Technical Notes to indicate that since 10.12.2, macOS includes version 7.3p1 of OpenSSH and its new behaviors.

In ~/.ssh create config file with the following content:

Host * (asterisk for all hosts or add specific host)
  AddKeysToAgent yes
  UseKeychain yes
  IdentityFile <key> (e.g. ~/.ssh/userKey)