bug#37866: Finder of MacOS Catalina cannot open a file with Emacs

[Masso Chailly]

After upgrading to macOS Catalina, Emacs (v26.3 from GNU Emacs for Mac OS X) works very strange. Without Emacs already running, Finder can open a file with Emacs as usual. But once Emacs.app is running, it cannot any longer. For example, double clicking the file on Finder window does nothing; no error message, either.

Opening a file from Emacs GUI causes no problem. Drag-ang-drop'ing a file onto Emacs also works fine.

Best regards,

Masso

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In GNU Emacs 26.3 (build 1, x86_64-apple-darwin18.2.0, NS appkit-1671.20 Version 10.14.3 (Build 18D109))

 of 2019-09-02 built on builder10-14.porkrind.org

Windowing system distributor 'Apple', version 10.3.1894

Recent messages:

Loading /Users/Masso/Tower/Emacs/Preferences.el (source)...

Loading ‘web-mode’: unescaped character literals `?]' detected!

Loading /Users/Masso/Tower/Emacs/Preferences.el (source)...done

Loading /Users/Masso/Tower/Emacs/Customizations.el (source)...done

For information about GNU Emacs and the GNU system, type C-h C-a.

Loading dired-x...done

Loading dired-aux...done

Configured using:

 'configure --with-ns '--enable-locallisppath=/Library/Application

 Support/Emacs/${version}/site-lisp:/Library/Application

 Support/Emacs/site-lisp' --with-modules'

Configured features:

NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS MODULES THREADS

Important settings:

  value of $LANG: en_US.UTF-8

  locale-coding-system: utf-8-unix

Major mode: Text

Minor modes in effect:

  global-undo-tree-mode: t

  undo-tree-mode: t

  show-paren-mode: t

  delete-selection-mode: t

  global-eldoc-mode: t

  electric-indent-mode: t

  mouse-wheel-mode: t

  menu-bar-mode: t

  file-name-shadow-mode: t

  global-font-lock-mode: t

  font-lock-mode: t

  blink-cursor-mode: t

  auto-composition-mode: t

  auto-encryption-mode: t

  auto-compression-mode: t

  column-number-mode: t

  line-number-mode: t

  global-visual-line-mode: t

  visual-line-mode: t

  transient-mark-mode: t

Load-path shadows:

None found.

Features:

(shadow sort mail-extr emacsbug message rmc puny dired-aux dired-x dired

dired-loaddefs format-spec rfc822 mml mml-sec epa epg gnus-util rmail

rmail-loaddefs mm-decode mm-bodies mm-encode mail-parse rfc2231

mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums

mm-util mail-prsvr mail-utils Preferences server web-mode advice derived

edmacro kmacro disp-table bibwiz refley texson undo-tree diff buffet

ls-lisp seeker basil apple aurora keys paren delsel cua-base

deeper-blue-theme finder-inf info tex-site package easymenu epg-config

url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs

eieio-loaddefs password-cache url-vars seq byte-opt gv bytecomp

byte-compile cconv cl-loaddefs cl-lib time-date tooltip eldoc electric

uniquify ediff-hook vc-hooks lisp-float-type mwheel term/ns-win ns-win

ucs-normalize mule-util term/common-win tool-bar dnd fontset image

regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode

lisp-mode prog-mode register page menu-bar rfn-eshadow isearch timer

select scroll-bar mouse jit-lock font-lock syntax facemenu font-core

term/tty-colors frame cl-generic cham georgian utf-8-lang misc-lang

vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932

hebrew greek romanian slovak czech european ethiopic indian cyrillic

chinese composite charscript charprop case-table epa-hook jka-cmpr-hook

help simple abbrev obarray minibuffer cl-preloaded nadvice loaddefs

button faces cus-face macroexp files text-properties overlay sha1 md5

base64 format env code-pages mule custom widget hashtable-print-readable

backquote threads kqueue cocoa ns multi-tty make-network-process emacs)

Memory information:

((conses 16 284274 11043)

 (symbols 48 24080 2)

 (miscs 40 50 252)

 (strings 32 44149 2072)

 (string-bytes 1 1156678)

 (vectors 16 39426)

 (vector-slots 8 774132 9466)

 (floats 8 73 63)

 (intervals 56 224 0)

 (buffers 992 11))