Hi All just in case this is the issue, both machines being “up to date”, and it affects others This works (passwd-less login): [pussycat] /Users/mary [501]% sshd --help OpenSSH_7.5p1, LibreSSL 2.5.4 This does not (identical keys and config files) [haycorn] /Users/jam [291]% sshd --help OpenSSH_7.6p1, OpenSSL 1.0.2p 14 Aug 2018 James