semgilo /Applications/Spine.app/Contents/MacOS/Spine -u "Spine 4.1.17 Enterprise" -i images -o ./pack -n spineboy-ess -p ./pack.json -j . -e ./export.json

This looks wrong, -j . specifies the path to a directory, but you should enter a path to the project file, e.g. ./yourproject.spine

semgilo -u "Spine 4.1.17 Enterprise"

The parameter of the -u option is wrong, it should be only "4.1.17" not "Spine 4.1.17 Enterprise".

"$SPINE_EXE" -u "4.1.17" -i images -o ./pack -n spineboy-ess -p ./pack.json -j ./spineboy-ess.spine

@semgilo After correcting the above parameter, unfortunately I could not reproduce any issue with your above pack.json and export.json files. When exporting the binary skeleton without an atlas and separately exporting the atlas using the pack.json file, then placing all separately exported assets in the same directory in Unity, everything was imported correctly. Nothing displayed incorrectly. What exact steps did you perform that led to your problem?

By the way, you can use three backticks "```" around code for a multi-line block of code, as your above posting looks as if every single line was enclosed with single backticks "`".

@semgilo Thinking about your screenshot: did you perhaps not copy both the spineboy.atlas.txt and spineboy.png atlas texture over together? Please note that the atlas textures and the atlas.txt file are an inseparable pair.

Spine's CLI parameters are configuration, then an action. You can have multiple actions:

[config for action] [action] [config for action] [action]

Your command line is:

 -i images -o ./pack -n spineboy-ess -p ./pack.json -j ./spineboy-ess.spine

The first action is that you pack:

-i images -o ./pack -n spineboy-ess -p ./pack.json

Then you specify -j, which is short for --project and gives the packer context so it can pack meshes intelligently. However, there is no action after the configuration:

-j ./spineboy-ess.spine

If you want the project context for your packing, it must come before the pack action -p:

-i images -o ./pack -n spineboy-ess -j ./spineboy-ess.spine -p ./pack.json