chsh -s /usr/local/bin/fish
を sudo vi /etc/shells
で開いて追加して再起動。
# List of acceptable shells for chpass(1). # Ftpd will not allow users to connect who are not using # one of these shells. /bin/bash /bin/csh /bin/dash /bin/ksh /bin/sh /bin/tcsh /bin/zsh # デフォルトシェルにfishを指定 chsh -s /usr/local/bin/fish