diff --git a/setup.py b/setup.py
index 03b27a2b..67e6bb25 100644
--- a/setup.py
+++ b/setup.py
@@ -58,6 +58,7 @@ if 'darwin' in sys.platform:
         '-DNG_INSTALL_DIR_BIN=bin',
         '-DNG_INSTALL_DIR_CMAKE=netgen/cmake',
         '-DNG_INSTALL_DIR_INCLUDE=netgen/include',
+        '-DNG_INSTALL_DIR_RES=share',
     ]
 elif 'win' in sys.platform:
     cmake_args += [
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index a0783363..55fcd1ee 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,2 +1,7 @@
 add_subdirectory(catch)
 add_subdirectory(pytest)
+
+# this code goes here, because tests is the last add_subdirectory (otherwise it gets executed too early)
+if(APPLE AND BUILD_FOR_CONDA)
+    install(CODE "execute_process(COMMAND sh -c \"codesign --force -s - netgen/*.so netgen/*.dylib pyngcore/*.so\" WORKING_DIRECTORY ${CMAKE_INSTALL_PREFIX})")
+endif(APPLE AND BUILD_FOR_CONDA)