↓で普通に文字化けなく使えてる

(set-default-coding-systems 'euc-jp-unix)
(set-terminal-coding-system 'euc-jp)
(set-keyboard-coding-system 'euc-jp)
(set-file-name-coding-system 'utf-8)
(set-clipboard-coding-system 'sjis-mac)