diff --git a/src/external/e57.cmake b/src/external/e57.cmake
index 441ab13a2..44bf91b39 100644
--- a/src/external/e57.cmake
+++ b/src/external/e57.cmake
@@ -30,13 +30,17 @@ if (TARGET XercesC::XercesC)
 			message(STATUS "- libE57 - using downloaded source")
 
 			set(MESSAGE_QUIET ON)
-			set(E57_BUILD_SHARED OFF)
+			if (APPLE)
+				set(E57_BUILD_SHARED OFF)
+			endif()
 			add_subdirectory(${LIBE57_DIR} EXCLUDE_FROM_ALL)
 			unset(MESSAGE_QUIET)
 
 			add_library(external-libE57 INTERFACE)
 			target_link_libraries(external-libE57 INTERFACE E57Format)
-			#install(TARGETS E57Format DESTINATION ${MESHLAB_LIB_INSTALL_DIR})
+			if (NOT APPLE)
+				install(TARGETS E57Format DESTINATION ${MESHLAB_LIB_INSTALL_DIR})
+			endif()
 		endif()
 	endif()
 else()
diff --git a/src/external/muparser.cmake b/src/external/muparser.cmake
index 6640a37ae..191f4ad23 100644
--- a/src/external/muparser.cmake
+++ b/src/external/muparser.cmake
@@ -38,7 +38,9 @@ elseif(MESHLAB_ALLOW_DOWNLOAD_SOURCE_MUPARSER)
 		if(NOT OpenMP_CXX_FOUND)
 			set(ENABLE_OPENMP OFF)
 		endif()
-		set(BUILD_SHARED_LIBS OFF)
+		if(APPLE)
+			set(BUILD_SHARED_LIBS OFF)
+		endif()
 		add_subdirectory(${MUPARSER_DIR} EXCLUDE_FROM_ALL)
 		if (APPLE AND OpenMP_CXX_FOUND)
 			target_link_libraries(muparser PRIVATE OpenMP::OpenMP_CXX)
@@ -52,6 +54,8 @@ elseif(MESHLAB_ALLOW_DOWNLOAD_SOURCE_MUPARSER)
 
 		add_library(external-muparser INTERFACE)
 		target_link_libraries(external-muparser INTERFACE muparser)
-		#install(TARGETS muparser DESTINATION ${MESHLAB_LIB_INSTALL_DIR})
+		if (NOT APPLE)
+			install(TARGETS muparser DESTINATION ${MESHLAB_LIB_INSTALL_DIR})
+		endif()
 	endif()
 endif()