diff --git a/CMakeLists.txt b/CMakeLists.txt
index f7c53ff..b7671cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,11 +39,19 @@
 set(pluginName	Util)
 set(SOURCES		domain_util.cpp util_plugin.cpp)
 
-set (CMAKE_CXX_STANDARD 17)
+set (CMAKE_CXX_STANDARD 14)
+
+# Note: 
+# In C++ 17, std::unary_function has been removed. Unfortunately, UG4's boost is outdated... 
+# FYI Starting with 1.76.0 Configure boost:
+# https://www.boost.org/doc/libs/1_76_0/libs/config/doc/html/boost_config/boost_macro_reference.html 
+# set (CMAKE_CXX_STANDARD 17)
+# add_compile_definitions(BOOST_NO_CXX98_FUNCTION_BASE)
+
 ################################################################################
 # The code below doesn't have to be changed (usually)
 ################################################################################
-cmake_minimum_required(VERSION 2.6)
+# cmake_minimum_required(VERSION 2.6)
 
 project(UG_PLUGIN_${pluginName})
 
@@ -74,12 +82,18 @@ if(USE_PYBIND11)
 	add_library(${pluginName} STATIC ${SOURCES})
 
 	SET(myPluginSources util_plugin_pybind.cpp)
-	# SET(myLibraries ug4 SuperLU6)
+	SET(myLibraries ${pluginName} ${targetLibraryName}) # targetLibraryName is either ug4 or ug4_s
 	
 	# First argument must match module name in PYBIND11_MODULE call
 	python_add_library(pyutil MODULE ${myPluginSources} ${SOURCES} WITH_SOABI)
 	# ug4pybind_add_module(pyutil ${myPluginSources} ${myLibraries})
-	target_link_libraries (pyutil PRIVATE ${pluginName} ug4_s)
-	set_target_properties(pyutil PROPERTIES INSTALL_RPATH "$ORIGIN/..:$ORIGIN/../../../lib")
+	target_link_libraries (pyutil PRIVATE ${myLibraries})
+	if(APPLE)
+    	set_target_properties(pyutil PROPERTIES 
+    		INSTALL_RPATH "@loader_path;@loader_path/../lib"
+    		BUILD_WITH_INSTALL_RPATH TRUE)
+	elseif(LINUX AND NOT APPLE)
+		set_target_properties(pyutil PROPERTIES INSTALL_RPATH "$ORIGIN:$ORIGIN/../lib")
+	endif()
 	install(TARGETS pyutil LIBRARY DESTINATION ug4py COMPONENT pymodules)
 endif(USE_PYBIND11)
diff --git a/solver_util.h b/solver_util.h
index 0bba410..218d053 100644
--- a/solver_util.h
+++ b/solver_util.h
@@ -5,6 +5,9 @@
 #ifndef UG4_SOLVER_UTIL_H
 #define UG4_SOLVER_UTIL_H
 
+#ifdef UG_USE_JSON
+
+
 #include <nlohmann/json.hpp>
 
 #include "common/common.h"
@@ -311,16 +314,16 @@ namespace Util {
             //TODO:Tim create sgs
         }
         else if(type == "egs"){
-            // create egs
+            //TODO:Lukas
         }
         else if(type == "cgs"){
-            // create cgs
+            //TODO:Myrto
         }
         else if(type == "ssc"){
             //TODO:Duy create ssc
         }
         else if(type == "gmg"){
-            // create gmg
+            //TODO: Julian
         }
         else if(type == "schur"){
             //TODO:Duy create schur
@@ -438,4 +441,6 @@ class SolverUtilFunctionProvider{
 };
 } //namespace util
 } //namespace ug
+
+#endif // UG_USE_JSON
 #endif //UG4_SOLVER_UTIL_H
diff --git a/util_plugin.cpp b/util_plugin.cpp
index 719726e..00bbe73 100644
--- a/util_plugin.cpp
+++ b/util_plugin.cpp
@@ -138,7 +138,7 @@ static void DomainAlgebra(TRegistry& reg, string grp)
 	string suffix = GetDomainAlgebraSuffix<TDomain,TAlgebra>();
 	string tag = GetDomainAlgebraTag<TDomain,TAlgebra>();
 
-
+#ifdef UG_USE_JSON
         {
 
             typedef SolverUtilFunctionProvider<TDomain, TAlgebra> T;
@@ -150,6 +150,7 @@ static void DomainAlgebra(TRegistry& reg, string grp)
                     .set_construct_as_smart_pointer(true);
             reg.add_class_to_group(name, "SolverUtilFunctionProvider", tag);
         }
+#endif
         /*{
             // This is more complicated, as the return type should be included in name.
             std::string grpname = std::string("CreatePreconditioner");
@@ -163,6 +164,7 @@ static void DomainAlgebra(TRegistry& reg, string grp)
        // reg.add_function(grpname.append(suffix),
          //                static_cast<SmartPtr<TDomain>(*)(const std::string&, int, const std::vector<std::string> &)>
            //              (&CreateDomain<TDomain>), grpname);
+#ifdef UG_USE_JSON
         {
             //typedef Domain<dim> domain_type;
             typedef SolverUtil<TDomain, TAlgebra> T;
@@ -173,6 +175,7 @@ static void DomainAlgebra(TRegistry& reg, string grp)
                     .set_construct_as_smart_pointer(true);
             reg.add_class_to_group(name, "SolverUtil", tag);
         }
+#endif
 
     }
 
@@ -251,23 +254,26 @@ static void Dimension(TRegistry& reg, string grp)
  * @param reg				registry
  * @param parentGroup		group for sorting of functionality
  */
-template <typename TAlgebra>
-static void Algebra(Registry& reg, string grp)
+template <typename TAlgebra, typename TRegistry=ug::bridge::Registry>
+static void Algebra(TRegistry& reg, string grp)
 {
-//	useful defines
+	//	useful defines
 	string suffix = GetAlgebraSuffix<TAlgebra>();
 	string tag = GetAlgebraTag<TAlgebra>();
-    typedef typename TAlgebra::vector_type vector_type;
-        {
-            // This is more complicated, as the return type should be included in name.
-            {
-                std::string grpname = std::string("CreateConvCheck");
-                reg.add_function(grpname.append(suffix),
-                                 static_cast<SmartPtr<StdConvCheck<vector_type>>(*)(nlohmann::json &)>
-                                 (&CreateConvCheck < TAlgebra > ), grpname);
-            }
+	typedef typename TAlgebra::vector_type vector_type;
 
-        }
+#ifdef UG_USE_JSON
+	{
+		// This is more complicated, as the return type should be included in name.
+		{
+			std::string grpname = std::string("CreateConvCheck");
+			reg.add_function(grpname.append(suffix),
+					static_cast<SmartPtr<StdConvCheck<vector_type>>(*)(nlohmann::json &)>
+			(&CreateConvCheck < TAlgebra > ), grpname);
+		}
+
+	}
+#endif
 
 }
 
@@ -296,7 +302,7 @@ static void Common(Registry& reg, string grp)
 
 
 template <typename TRegistry=ug::bridge::Registry>
-void RegisterBridge_Util(TRegistry& reg, string grp)
+void RegisterBridge_Util_(TRegistry* reg, string grp)
 {
 	grp.append("/Util");
 	typedef Util::Functionality Functionality;
@@ -305,16 +311,16 @@ void RegisterBridge_Util(TRegistry& reg, string grp)
 #ifndef UG_USE_PYBIND11
 		//RegisterCommon<Functionality>(*reg,grp);
 		//RegisterDimensionDependent<Functionality>(*reg,grp);
-        RegisterDomainAlgebraDependent<Functionality>(reg,grp);
-        RegisterDomainDependent<Functionality>(reg,grp);
-		RegisterAlgebraDependent<Functionality>(reg,grp);
+        RegisterDomainAlgebraDependent<Functionality>(*reg,grp);
+        RegisterDomainDependent<Functionality>(*reg,grp);
+		RegisterAlgebraDependent<Functionality>(*reg,grp);
 
 #else
 		//RegisterCommon<Functionality, TRegistry>(*reg,grp);
 		//RegisterDimensionDependent<Functionality, TRegistry>(*reg,grp);
-		RegisterDomainDependent<Functionality, TRegistry>(reg,grp);
-		RegisterAlgebraDependent<Functionality>(*reg,grp);
-		RegisterDomainAlgebraDependent<Functionality>(*reg,grp);
+		RegisterDomainDependent<Functionality, TRegistry>(*reg,grp);
+		RegisterAlgebraDependent<Functionality, TRegistry>(*reg,grp);
+		RegisterDomainAlgebraDependent<Functionality, TRegistry>(*reg,grp);
 #endif
 
 	}
@@ -328,7 +334,7 @@ void RegisterBridge_Util(TRegistry& reg, string grp)
 extern "C" void
 InitUGPlugin_Util(Registry* reg, string grp)
 {
-	RegisterBridge_Util(*reg, grp);
+	RegisterBridge_Util_(reg, grp);
 }
 
 extern "C" UG_API void
@@ -337,10 +343,10 @@ FinalizeUGPlugin_Util()
 
 
 #ifdef UG_USE_PYBIND11 // Expose for pybind11.
-namespace UtilBridge{
+namespace Util {
 	void InitUGPlugin(ug::pybind::Registry* reg, string grp)
 	{
-		RegisterBridge_Util<ug::pybind::Registry>(*reg, grp);
+		RegisterBridge_Util_<ug::pybind::Registry>(reg, grp);
 	}
 }
 #endif
diff --git a/util_plugin.h b/util_plugin.h
index b29da89..a377d37 100644
--- a/util_plugin.h
+++ b/util_plugin.h
@@ -13,12 +13,10 @@ extern "C" void FinalizeUGPlugin_Util();
 #include "bindings/pybind/ug_pybind.h"
 
 namespace ug {
-namespace bridge {
-namespace UtilBridge{
+namespace Util{
 	void InitUGPlugin(ug::pybind::Registry* reg, std::string grp);
 }
 }
-}
 #endif
 
 
diff --git a/util_plugin_pybind.cpp b/util_plugin_pybind.cpp
index 544feaa..6c13bb4 100644
--- a/util_plugin_pybind.cpp
+++ b/util_plugin_pybind.cpp
@@ -13,7 +13,7 @@ PYBIND11_MODULE(pyutil, m)
 	ug::pybind::Registry registry(m);
 	std::string name("Utilities");
 
-	ug::bridge::UtilBridge::InitUGPlugin(&registry, name);
+	ug::Util::InitUGPlugin(&registry, name);
 }
 
 #endif