Implementing SDL on MacOS

I have developed an app using SDL2 installed via brew. It works fine in my development environment, but when trying to run it on another computer, I have the following error:

Drivers count: 2
Driver name: opengl
Driver name: software
Initialize all SDL subsystems
Set up the window
exists true
failed to load  "/Users/joker/Desktop/SDLTest.app/Contents/MacOS/look.png"
Failed loading libpng.dylib: dlopen(libpng.dylib, 6): image not found

      

        
        
        
      

    

Here's my output as I type otool -L SDLTest.app/Contents/MacOS/SDLTest

:

SDLTest.app/Contents/MacOS/SDLTest:
    @executable_path/../Frameworks/libSDL2-2.0.0.dylib (compatibility version 3.0.0, current version 3.1.0)
    @executable_path/../Frameworks/libSDL2_image-2.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
    @executable_path/../Frameworks/libSDL2_ttf-2.0.0.dylib (compatibility version 11.0.0, current version 11.2.0)
    @executable_path/../Frameworks/QtWidgets.framework/Versions/5/QtWidgets (compatibility version 5.3.0, current version 5.3.1)
    @executable_path/../Frameworks/QtGui.framework/Versions/5/QtGui (compatibility version 5.3.0, current version 5.3.1)
    @executable_path/../Frameworks/QtCore.framework/Versions/5/QtCore (compatibility version 5.3.0, current version 5.3.1)
    /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL (compatibility version 1.0.0, current version 1.0.0)
    /System/Library/Frameworks/AGL.framework/Versions/A/AGL (compatibility version 1.0.0, current version 1.0.0)
    /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.0.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)

      

        
        
        
      

    

Here's my output as I type otool -L SDLTest.app/Frameworks/libSDL2_image-2.0.0.dylib

:

SDLTest.app/Contents/Frameworks/libSDL2_image-2.0.0.dylib:
    @executable_path/../Frameworks/libSDL2_image-2.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)
    @executable_path/../Frameworks/libSDL2-2.0.0.dylib (compatibility version 3.0.0, current version 3.1.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1197.1.1)

      

        
        
        
      

    

Here are the contents of my folder SDLTest.app/Contents/Frameworks

:

total 3064
drwxr-xr-x  14 martin  staff   476B 27 oct 15:11 .
drwxr-xr-x   7 martin  staff   238B 27 oct 15:11 ..
drwxr-xr-x   4 martin  staff   136B 27 oct 15:11 QtCore.framework
drwxr-xr-x   4 martin  staff   136B 27 oct 15:11 QtGui.framework
drwxr-xr-x   4 martin  staff   136B 27 oct 15:11 QtPrintSupport.framework
drwxr-xr-x   4 martin  staff   136B 27 oct 15:11 QtWidgets.framework
drwxr-xr-x   6 martin  staff   204B 27 oct 15:11 SDL2.framework
drwxr-xr-x   7 martin  staff   238B 27 oct 15:11 SDL2_image.framework
drwxr-xr-x   7 martin  staff   238B 27 oct 15:11 SDL2_ttf.framework
-rw-r--r--   1 martin  staff   755K 27 oct 15:11 libSDL2-2.0.0.dylib
-rw-r--r--   1 martin  staff    78K 27 oct 15:11 libSDL2_image-2.0.0.dylib
-rw-r--r--   1 martin  staff    33K 27 oct 15:11 libSDL2_ttf-2.0.0.dylib
-rw-r--r--   1 martin  staff   491K 27 oct 15:11 libfreetype.6.dylib
-rw-r--r--   1 martin  staff   164K 27 oct 15:11 libpng16.16.dylib