Help needed Ortho4xp

[tony99982]

Hi,

I am trying to install Ortho4xp (A photoscenerey program for flightsimulator x-plane 11) on my macbook.
To run this program python is needed and I installed this on my macbook
Python 3.6.5 plus the modules below to make Ortho running correctly:

easy_install-3.6 pip
pip3.6 install numpy
pip3.6 install pytest-runner
pip3.6 install overpy
pip3.6 install requests
pip3.6 install Image
pip3.6 install Pyproj
brew install p7zip

When I finally want to run the program I get this message:

Tony@Tonys-MacBook-Pro-15 • Wed Apr 04 07:31:17 • /users/tony/desktop/ortho4xp]
# python3 Ortho4XP_devel.py
Traceback (most recent call last):
File "Ortho4XP_devel.py", line 59, in <module>
from PIL import Image, ImageDraw, ImageFilter, ImageTk
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/PIL/Image.py", line 60, in <module>
from . import _imaging as core
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/PIL/_imaging.cpython-36m-darwin.so, 2): Symbol not found: _clock_gettime
Referenced from: /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/PIL/.dylibs/liblzma.5.dylib (which was built for Mac OS X 10.12)
Expected in: /usr/lib/libSystem.B.dylib
in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/PIL/.dylibs/liblzma.5.dylib

I think there is something wrong with a module, but my knowledge doesn't reach that far.
Does anybody know what might be wrong here?
My OS is El Capitan version 10.11.6

Thanks in advance

Tony