> The patch of `nsterm.m` has repaired much of the functionality of
 > `frame-inhibit-implied-resize`.  The two tests that previously failed
 > now work as expected:
 >
 >       1.  From a maximized frame, I can change the `font` to Courier
 >           18 using `set-face-attribute` and there is no need to set
 >           `frame-inhibit-implied-resize` in that circumstance.

I'm afraid that setting ‘frame-inhibit-implied-resize’ would't have
helped anyway in that case.

 >       2.  From a frame that is smaller than the screen size, I can use
 >           `set-face-attribute` to change the font to Courier 18
 >           provided that `frame-inhibit-implied-resize` is set to `t`.

OK.  Together with the two I sent earlier I attach one additional
change, this time for the tool bar.  You don't use it, so it shouldn't
affect you.  Nevertheless keep it included, it might have side effects.

 > The problem I am having is with a situation where
 > `ns-auto-hide-menu-bar` is set to `t`.  As previously noted in this
 > thread, the `top` frame parameter is ignored when making a new frame
 > that is the size of the screen -- the new frame appears substantially
 > above the top of the display -- i.e., one-half out of sight.  When the
 > new frame is partially above the top of the screen,
 > `set-face-attribute` substantially enlarges the frame even though
 > `frame-inhibit-implied-resize` is set to `t`.  When the frame comes
 > back into full view (e.g., top 0, left 0), it is then possible to
 > apply `set-face-attribute` without altering the dimensions of the
 > frame.  The following are two examples -- one example works, the other
 > example is broken -- both rely upon `ns-auto-hide-menu-bar` being set
 > to `t`.
 >
 > (setq ns-auto-hide-menu-bar t)
 >
 > ;; WORKS
 > (let* (
 >      (frame-inhibit-implied-resize t)
 >      (frame
 >        (make-frame '(
 >           (vertical-scroll-bars)
 >           (left-fringe . 8)
 >           (right-fringe . 8)
 >           (width . 1259.0)
 >           (height . 771.0)
 >           (tool-bar-lines . 0)))) )
 >    (set-frame-position frame 0 0)
 >    (set-face-attribute 'default frame :font "-*-Courier-normal-normal-normal-*-18-*-*-*-m-0-iso10646-1"))
 >
 > ;; BROKEN
 > (let* (
 >      (frame-inhibit-implied-resize t)
 >      (frame
 >        (make-frame '(
 >          (font . "-*-Courier-normal-normal-normal-*-18-*-*-*-m-0-iso10646-1")
 >          (vertical-scroll-bars)
 >          (left-fringe . 8)
 >          (right-fringe . 8)
 >          (width . 1259.0)
 >          (height . 771.0)
 >          (tool-bar-lines . 0)))) )
 >    (set-frame-position frame 0 0))

I have no idea what this small segment in nsterm.m

   if (ns_menu_bar_should_be_hidden ())
     return frameRect;

is meant to accomplish.  Try to comment it out and see what happens.  If
you see a difference, we'll have to look into it.

martin