Force load python libs.

Applications/CLI/CMakeLists.txt

@@ -64,6 +64,9 @@ target_link_libraries(
         $<$<TARGET_EXISTS:petsc>:petsc>
         tclap
 )
+if(APPLE)
+    target_link_libraries(ogs PRIVATE "-Wl,-force_load,${Python_LIBRARIES}")
+endif()
 
 # ---- Tests ----
 add_test(NAME ogs_no_args COMMAND ogs)