Is there an equivalent of FastStone Image Viewer for Mac OS?

Question

macOS

To work, it is necessary to glue a lot of images vertically into one long strip.
On Windows, I used FastStone Image Viewer for this, selected a pack of pictures in the right order and they were glued into one canvas. Unfortunately, this program does not have a version for the poppy, but it is very necessary.
Please suggest a program with similar functionality.
Thank you!

Answer 1

Since the question was asked on Habré, here is a solution for those who are not afraid to get dirty in machine oil.
Install ffmpeg - you can download it for mac. It has a vstack filter - which just takes a lot of inputs, as long as they are the same width, and glues them vertically. Let's say there are equal in width

4 pictures of cat

Run the command in Terminal. For example:

ffmpeg \
  -i 320.jpg  -i 180.jpg  -i 360.jpg  -i 540.jpg  \
  -filter_complex vstack=inputs=4 \
  output.jpg

Amazing result

output.jpg

It is not convenient that you have to manually write for each input image -i имяфайла. And when selected in the Finder in some desired order and dragged to the Terminal, the order will change to alphabetical.
But it can be run even on a server (ffmpeg is available for Linux, Windows), and it works very quickly.

Answer 2

Is Photo Collage Maker - CollageFactory Free good ?