This works:

$ mac-emacs -Q --batch --eval '(message "%S" (boundp
'\''ns-version-string))'
t

But not the below. It looks like no accessible event loop so no sleep/wake
in batch on macOS. This could be addressed by the current NS experts. It's
not really clear why it was done this way. Running applescript
scripts doesn't have to be tied to a GUI. Neither does sleep/wake.

$ mac-emacs -Q --batch --eval '(ns-do-applescript "display notification
\"foo\"")'
+ exec /Applications/Emacs.app/Contents/MacOS/Emacs -Q --batch --eval
'(ns-do-applescript "display notification \"foo\"")'

Error: error ("Window system is not in use or not initialized")
  mapbacktrace(#f(compiled-function (evald func args flags) #<bytecode
-0x1fffb8046512f81>))
  debug-early-backtrace()
  debug-early(error (error "Window system is not in use or not
initialized"))
  ns-do-applescript("display notification \"foo\"")
  command-line-1(("--eval" "(ns-do-applescript \"display notification
\\\"foo\\\"\")"))
  command-line()
  normal-top-level()
Window system is not in use or not initialized

On Fri, Feb 7, 2025 at 10:29 AM Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Ship Mints <shipmints@gmail.com>
> > Date: Fri, 7 Feb 2025 08:20:09 -0500
> > Cc: acohen@ust.hk, 63620@debbugs.gnu.org, monnier@iro.umontreal.ca,
> >       michael.albinus@gmx.de
> >
> > In nsterm.m, it says:
> >
> >   /* emacs -nw doesn't have an NSApp, so we're done.  */
> >   if (NSApp == nil)
> >
> > That may influence if sleep/wake features are available in batch, at
> least for macos, yes?
>
> Could be.  I know almost nothing about how Emacs's inner loops work on
> macOS, sorry.  Only that it's different from every other platform.
>