Bad configuration: cannot ssh As described in many other posts, after upgrading to MacOS Sierra I modified the ssh config file like so:

Host me
HostName login.hpc.ugent.be
User vscxxxxx
Port 22

Host *
  AddKeysToAgent yes
  UseKeychain yes


Still I get the following error:

$ssh -Y vscxxxxx@login.hpc.ugent.be
/Users/manfredo/.ssh/config: line 8: Bad configuration option: usekeychain
/Users/manfredo/.ssh/config: terminating, 1 bad configuration options


What am I missing?
Just remove the UseKeychain yes line from your configuration. The update broke existing setup by removing this option.