diff --git a/docs/building_pybindings.txt b/docs/building_pybindings.txt
index 47e2bd81bc..dcbbc74142 100644
--- a/docs/building_pybindings.txt
+++ b/docs/building_pybindings.txt
@@ -92,3 +92,14 @@ Run tests:
   MWM_RESOURCES_DIR=data \
   MWM_WRITABLE_DIR=data \
   search/pysearch/run_search_engine.py
+
+Problems and solutions
+----------------------
+1. Building binding on MacOS Catalina 10.15.5.
+   If you try to build one of the bindings on MacOS Catalina with Apple clang version 11.0.3 you'll see the error that the flag fcoalesce-templates is not supported. The workaround is to remove this flag from 3party/boost/tools/build/src/tools/darwin.jam and 3party/boost/tools/build/src/tools/darwin.py
+
+2. If there is a build errors while Boost.Python building the C++ headers are not seen. For example,  fatal error: 'cstddef' file not found. Some flags should be added while building bindings. For example, instead launching:
+  $ python3.7 kml/pykmlib/setup.py build --omim-builddir=kml/pykmlib/cmake-build-release
+
+should be launched:
+  $ MACOSX_DEPLOYMENT_TARGET=10.9 CC=clang CXX=clang++ CFLAGS='-stdlib=libc++' python3.7 kml/pykmlib/setup.py build --omim-builddir=kml/pykmlib/cmake-build-release