受 auto-dark-emacs - My attempt to make emacs follow the global Dark Mode on MacOS : emacs 启发，写了一个用来开关 macOS 黑暗模式的命令，顺便适配下 Emacs 的主题：
(defun mac-toggle-dark-mode ()
"Toggle dark mode"
(interactive)
(do-applescript "
tell application \"System Events\"
tell appearance preferences
set dark mode to not dark mode
end tell
end tell"))
(defun mac-dark-mode-p ()
"Return t if dark mode is on, otherwise return nil."
(string=
"true"
(do-applescript
"tell application \"System Events\" to get dark mode of appearance preferences")))
(defun chunyang-mac-toggle-theme ()
"打开或关闭黑暗模式，并设置 Emacs 主题."
(interactive)
(mac-toggle-dark-mode)
(mapc 'disable-theme custom-enabled-themes)
(load-theme
(if (mac-dark-mode-p)
'sanityinc-tomorrow-night
'sanityinc-tomorrow-day)
t))