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+## MacOS binaries
+
+The MacOS binaries contain Python 3.7.3 (or 2.7.16) 64 bit with all the needed modules and the web2py in the specified version: 
+ you don't need anything else to run them on MacOS! After uncompressing the zip file, you just need to click on the web2py icon inside.  
+
+They were produced on MacOS Sierra 10.12.6 + security update 2019.001.
+
+## Full MacOS build recipe
+
+1. grab and install the official Python program: we've got version 3.7.3 or 2.7.16 (64 bit). If you've chosen python 2, change pip3
+with pip, and python3 with python in the following instructions...
+
+2. Open a terminal, update tools with:
+
+"python3 -m pip install --upgrade pip"  
+"pip3 install --upgrade setuptools"   
+
+
+3. install PyInstaller with:  
+sudo -H pip3 install pyinstaller (we've got PyInstaller-3.4 )
+
+4. additional (but not required) packages:  
+(only for python 2: install Homebrew from https://brew.sh/#install , then 'brew install unixodbc' )  
+pip3 install psycopg2-binary = psycopg2-2.7.7  
+pip3 install pyodbc = pyodbc-4.0.26-cp37-cp37m  
+pip3 install python-ldap (on the windows message, accept to install the "Command line developer tools"). Rerun:  
+pip3 install python-ldap  
+
+5. grab latest web2py source from https://mdipierro.pythonanywhere.com/examples/static/web2py_src.zip 
+ (you need at least 2.18.3 for needed changes in gluon\admin.py). Open it to uncompress, in this example on Desktop/web2py
+
+
+6. take the file build_web2py.py and web2py.mac.spec  from this folder and place it on the Desktop/web2py  folder  
+
+7. edit the file /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyInstaller/hooks/hook-_tkinter.py 
+ and change one of its line according to https://github.com/pyinstaller/pyinstaller/pull/3830  
+
+8. (optional, for having a full working interactive shell) change the fake site.py module included within the PyInstaller installation 
+ with the content of the files web2py.site_37.py or web2py.site_27.py from this folder - see comments inside these files for details
+
+9. open a terminal, goto Desktop/web2py and run:  
+  
+python3 build_web2py.py
+
+10. if everything is fine, you'll obtain web2py_macos.zip on the Desktop/web2py  folder. Inside it, there is the web2py program with 
+ both the CMD version and the APP version.
+
+## Gothca
+
+Unfortunately, the APP version is still not working - see https://github.com/pyinstaller/pyinstaller/issues/3820 .