Yubikey fails on macOS Ventura with "sign_and_send_pubkey: signing failed"

Posted on Feb 24, 2023

$ ssh hambone
sign_and_send_pubkey: signing failed for RSA "cardno:11_9e5_49a" from agent: agent refused operation
user@hambone: Permission denied (publickey).

echo "disable-ccid" >> ~/.gnupg/scdaemon.conf

After adding that line to scdaemon.conf, I just restarted the GPG daemon and I was finally able to use my Yubikey again.

pkill gpg-agent; gpg-agent --homedir $HOME/.gnupg --daemon