Hello I'm trying to setup sshd to use only key (no password). But it doesn't seem to work, getting "Permission denied (publickey)." on Client & error 255 on Server. on the Server my /etc/ssh/sshd_config has following options set : PubkeyAuthentication yes PasswordAuthentication no ChallengeResponseAuthentication no I've generated key pair (ssh-keygen -t rsa) & added pub to ~/.ssh/known_hosts on the Server when I'm trying to connect from Client I get following : host$ ssh -vT host@iMac.local -i /Users/host/.ssh/iMac OpenSSH_7.3p1, LibreSSL 2.4.1 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 20: Applying options for * debug1: Connecting to imac.local [fe80::46a:da4b:6450:d98c%en0] port 22. debug1: Connection established debug1: identity file /Users/host/.ssh/iMac type 1 debug1: key_load_public: No such file or directory debug1: identity file /Users/host/.ssh/iMac-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.3 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.3 debug1: match: OpenSSH_7.3 pat OpenSSH* compat 0x04000000 debug1: Authenticating to imac.local:22 as 'host' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: email@example.com debug1: kex: host key algorithm: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: firstname.lastname@example.org MAC: <implicit> compression: none debug1: kex: client->server cipher: email@example.com MAC: <implicit> compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ecdsa-sha2-nistp256 SHA256:rxJDPZufTXwfc3nm3mChdsbDZtIyUuBR4A4ToHjRilQ debug1: Host 'imac.local' is known and matches the ECDSA host key. debug1: Found key in /Users/host/.ssh/known_hosts:24 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent] debug1: expecting SSH2_MSG_NEWKEYS debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512> debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /Users/host/.ssh/iMac debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey). Any help would be appreciated.