diff --git a/3rd_party/glew/CMakeLists.txt b/3rd_party/glew/CMakeLists.txt
index 148f46e2..976e1241 100644
--- a/3rd_party/glew/CMakeLists.txt
+++ b/3rd_party/glew/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.12)
 
 get_filename_component(MODULE_NAME ${CMAKE_CURRENT_SOURCE_DIR} NAME)
 set(PROJECT_NAME 3rd_${MODULE_NAME})
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 839fcc79..e37ca722 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,11 +22,11 @@ message("-- Setting C++11")
 # Let's also add the version to the path to allow multiple versions of Easy3D in the same directory.
 
 if (CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
-    if (WIN32 OR MSVC)  # windows
+    if (WIN32)      # windows
         set(CMAKE_INSTALL_PREFIX "C:/Program Files/Easy3D/${Easy3D_VERSION}" CACHE PATH "Installation directory" FORCE)
-    elseif (APPLE)      # macOS
+    elseif (APPLE)  # macOS
         set(CMAKE_INSTALL_PREFIX "/usr/local/Cellar/easy3d/${Easy3D_VERSION}" CACHE PATH "Installation directory" FORCE)
-    else ()             # Linux: different from tradition, let's keep everything together
+    else ()         # Linux: different from tradition, let's keep everything together
         set(CMAKE_INSTALL_PREFIX "/usr/local/easy3d-${Easy3D_VERSION}" CACHE PATH "Installation directory" FORCE)
     endif ()
 endif ()
@@ -114,7 +114,7 @@ if (Easy3D_BUILD_SHARED_LIBS)
     #Ref: Create dlls on Windows without declspec() using new CMake export all feature
     #     https://cmake.org/cmake/help/v3.4/prop_tgt/WINDOWS_EXPORT_ALL_SYMBOLS.html#prop_tgt:WINDOWS_EXPORT_ALL_SYMBOLS
     #     https://www.kitware.com/create-dlls-on-windows-without-declspec-using-new-cmake-export-all-feature/
-    if (WIN32 OR MSVC)
+    if (MSVC)
         set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
     endif ()
 else ()
@@ -218,7 +218,7 @@ function(add_module module headers sources private_dependencies public_dependenc
             SOVERSION ${Easy3D_MAJOR_VERSION}
             VERSION ${Easy3D_VERSION}
             )
-    if (WIN32 OR MSVC)
+    if (MSVC)
         target_compile_definitions(easy3d_${module} PUBLIC NOMINMAX WIN32_LEAN_AND_MEAN VC_EXTRALEAN _CRT_SECURE_NO_WARNINGS _CRT_SECURE_NO_DEPRECATE)  # get a clean windows
     endif ()
 
diff --git a/tutorials/Tutorial_203_Viewer_wxWidgets/CMakeLists.txt b/tutorials/Tutorial_203_Viewer_wxWidgets/CMakeLists.txt
index 050e5cd3..8d696b52 100644
--- a/tutorials/Tutorial_203_Viewer_wxWidgets/CMakeLists.txt
+++ b/tutorials/Tutorial_203_Viewer_wxWidgets/CMakeLists.txt
@@ -48,8 +48,8 @@ set(${PROJECT_NAME}_SOURCES
 		window.cpp
         )
 
-if (WIN32 OR MSVC)
-	set(${PROJECT_NAME}_RESOURCES "${CMAKE_CURRENT_LIST_DIR}/resources/sample.rc")
+if (MSVC)
+    set(${PROJECT_NAME}_RESOURCES "${CMAKE_CURRENT_LIST_DIR}/resources/sample.rc")
     add_executable(${PROJECT_NAME} ${${PROJECT_NAME}_HEADERS} ${${PROJECT_NAME}_SOURCES} ${${PROJECT_NAME}_RESOURCES}) # you can add "WIN32" to disable the console window
     message(STATUS "Creating the wxWidgets viewer with a console window")
 elseif (APPLE)