.tmux.confでOS固有処理を書く


if-shellで実現可能

tmux.conf
if-shell "uname | grep -q Darwin" "source-file ~/.dotfiles/.tmux.conf.osx" ""

~/.dotfiles/.tmux.conf.osxにはMacOSX固有処理を書くなど

参考

tmux configuration conditional to OS - Super User