An errata from October 29, 2024 for OpenBSD 7.6 fixed a problem with OpenSSH on big-endian platforms (like macppc and powerpc64),
https://www.openbsd.org/errata76.html If a big-endian machine doesn't have the errata fix, ssh might fail with an error, $ ssh 192.168.0.112 ssh_dispatch_run_fatal: Connection to 192.168.0.112 port 22: incorrect signature One can work around the problem by removing mlkem768x25519-sha256 from KexAlgorithms, $ ssh -o KexAlgorithms='-mlkem*' 192.168.0.112
