On Sat, Jun 11, 2016 at 10:48:26AM +0200, Blaz Merela wrote:

> Although Emacs 24.4 (9.0) does still hog the CPU whenever
> macOS boots. In this case, one must kill Emacs and then it's fine
> for the rest of the user-session.

The problem with Emacs hanging on startup when the machine is under heavy
load (e.g. at startup) should have been fixed in Emacs 25. It was caused by
event arriving before the initialization was done. See
http://git.savannah.gnu.org/cgit/emacs.git/commit/src?h=emacs-25&id=0392e241b844487261d4dfcccc9a442793e0a868
for details.

    -- Anders