total Emacs newbie here. When I try:

M-x image-dired RET FOLDER RET

The minibuffer shows this error:

Executable image-dired-cmd-create-thumbnail-program not found

When I check the *Messages* buffer it says:

Error running timer ‘image-dired-thumb-queue-run’: 
(error "Executable image-dired-cmd-create-thumbnail-program not found")
Unable to load image (image :type jpeg :file /Users/myUser/.emacs.d/image-dired/flower_5d5bfef050581bb59e32e9a4ef593dbd.thumb.jpg :relief 2 :margin 2)

and the *image-dired* buffer shows no thumbnails (although I can move through the buffer as if there were thumbnails).

I already installed ImageMagick as suggested here

> magick -version
Version: ImageMagick 7.1.0-23 Q16-HDRI x86_64 2022-02-05 https://imagemagick.org

and my PATH already points to /usr/local/bin:

> echo $PATH

where magick, convert and mogrify are

> which magick
> which convert
> which mogrify

I googled it but couldn't find any similar issue.

How could I fix this?

BTW, I'm using zsh 5.3 (x86_64-apple-darwin18.0), I don't know if that's relevant.


  • macOS Mojave 10.14.6
  • GNU Emacs 27.2

1 Answer 1


This is usually caused by GUI apps on macOS only inherit the default minimal environment variables. You can check this by run M-: (getenv "PATH") and M-: (executable-find image-dired-cmd-create-thumbnail-program).

If so, the most convenient way to solve it is to use exec-path-from-shell, or you can try to manually set image-dired-cmd-create-thumbnail-program to the absolute path like (setq image-dired-cmd-create-thumbnail-program "/usr/local/bin/convert")


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