Configure gpg-agent on a mac.

gpg-agent.plist

<!--
Place in $HOME/Library/LaunchAgents/gpg-agent.plist
-->
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Label</key>
	<string>gpg-agent</string>
	<key>ProgramArguments</key>
	<array>
		<string>/usr/local/bin/gpg-agent</string>
		<string>--daemon</string>
		<string>--enable-ssh-support</string>
		<string>--write-env-file</string>
		<string>/Users/5thWall/.gpg-agent-info</string>
	</array>
	<key>RunAtLoad</key>
	<true/>
</dict>
</plist>

rc.sh

# Add to your .[bash|zsh]rc
if [[ $(uname) == Darwin ]]; then
  if [ -f "${HOME}/.gpg-agent-info" ]; then
    . "${HOME}/.gpg-agent-info"
    export GPG_AGENT_INFO
    export SSH_AUTH_SOCK
  fi
fi