Steps to produce crash: Open Emacs (GUI version compiled with --with-ns) Hit C-g Note that this happens with or without my .emacs loaded. Additionally, the command 'keyboard-quit' does not cause a crash, only the shortcut. In GNU Emacs 24.3.50.1 (x86_64-apple-darwin, NS apple-appkit-1187.34) of 2013-03-14 on macbookpro Windowing system distributor `Apple', version 10.3.1187 Configured using: `configure --host=x86_64-apple-darwin --build=i686-apple-darwin build_alias=i686-apple-darwin host_alias=x86_64-apple-darwin --with-ns' Important settings: locale-coding-system: nil default enable-multibyte-characters: t Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent input: M-x e m a c s - C-a C-k s u b C-a C-k e m a c s - s u b u g C-a C-k s u b m i e m a c s - s u b u g C-a C-k r e p o r Recent messages: ("/Applications/Emacs.app/Contents/MacOS/Emacs") Starting Emacs daemon. When done with this frame, type C-x 5 0 Load-path shadows: None found. Features: (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils server time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel ns-win tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process ns multi-tty emacs)