A version of ssh-copy-id for the .bashrc file on your Mac.

.zshrc

ssh-copy-id() {
	USER=$(whoami)
	USAGE="Usage: `basename $0` [-i FILE] user@host"
	FILE="$HOME/.ssh/id_rsa.pub"

	if [ $# -lt 1 ]; then
		echo "$USAGE"
	fi


	while getopts “i::” OPTION; do
		case $OPTION in
			i)
				FILE=$OPTARG
				;;
			?)
				echo "$USAGE"
				;;
		esac
	done
	shift $OPTIND-1

	cat $FILE | ssh $1 "mkdir -p ~/.ssh; cat >> ~/.ssh/authorized_keys"
}

Might want to use $HOME instead of /Users/$USER, that'll be more portable.