diff --git a/_Build/cmake_MacOSMakeClang.sh b/_Build/cmake_MacOSMakeClang.sh
new file mode 100755
index 0000000..d94e615
--- /dev/null
+++ b/_Build/cmake_MacOSMakeClang.sh
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+PS3='Please enter your choice: '
+options=("Debug" "Debug Final" "Release" "Release Final" "Exit")
+select opt in "${options[@]}"
+do
+    case $opt in
+	"Debug")
+	    DirName=_DebugMacOSMakeClang
+	    Options="-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=g++ -D CMAKE_BUILD_TYPE=Debug -D CMAKE_INSTALL_PREFIX=_bin ../../source"
+		;;
+	"Debug Final")
+	    DirName=_DebugFinalMacOSMakeClang
+	    Options="-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=g++ -D CMAKE_BUILD_TYPE=Debug -D KYTY_FINAL=1 -D CMAKE_INSTALL_PREFIX=_bin ../../source"
+		;;
+	"Release")
+	    DirName=_ReleaseMacOSMakeClang
+	    Options="-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=g++ -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=_bin ../../source"
+		;;
+	"Release Final")
+	    DirName=_ReleaseFinalMacOSMakeClang
+	    Options="-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=g++ -D CMAKE_BUILD_TYPE=Release -D KYTY_FINAL=1 -D CMAKE_INSTALL_PREFIX=_bin ../../source"
+		;;
+    esac
+    break
+done
+
+if [ -z "$DirName" ]; then
+    exit
+fi
+
+mkdir $DirName
+cd $DirName
+echo make >_build
+echo make install/strip >>_build
+chmod +x _build
+cmake -G "Unix Makefiles" $Options
diff --git a/source/include/Kyty/Sys/SysDbg.h b/source/include/Kyty/Sys/SysDbg.h
index 24dd2f5..46a7846 100644
--- a/source/include/Kyty/Sys/SysDbg.h
+++ b/source/include/Kyty/Sys/SysDbg.h
@@ -4,9 +4,9 @@
 #include "Kyty/Core/Common.h"
 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
 #include "Kyty/Sys/Windows/SysWindowsDbg.h" // IWYU pragma: export
-#elif __linux__
+#elif defined(__linux__)
 #include "Kyty/Sys/Linux/SysLinuxDbg.h"     // IWYU pragma: export
-#elif __APPLE__
+#elif defined(__APPLE__)
 #include "Kyty/Sys/MacOS/SysMacOSDbg.h"     // IWYU pragma: export
 #else
 #   error "Unknown compiler"
diff --git a/source/include/Kyty/Sys/SysFileIO.h b/source/include/Kyty/Sys/SysFileIO.h
index 999218c..3e0a259 100644
--- a/source/include/Kyty/Sys/SysFileIO.h
+++ b/source/include/Kyty/Sys/SysFileIO.h
@@ -4,9 +4,9 @@
 #include "Kyty/Core/Common.h"
 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
 #include "Kyty/Sys/Windows/SysWindowsFileIO.h" // IWYU pragma: export
-#elif __linux__
+#elif defined(__linux__)
 #include "Kyty/Sys/Linux/SysLinuxFileIO.h"     // IWYU pragma: export
-#elif __APPLE__
+#elif defined(__APPLE__)
 #include "Kyty/Sys/MacOS/SysMacOSFileIO.h"     // IWYU pragma: export
 #else
 #   error "Unknown compiler"
diff --git a/source/include/Kyty/Sys/SysHeap.h b/source/include/Kyty/Sys/SysHeap.h
index 69e7e6a..7e6a2ef 100644
--- a/source/include/Kyty/Sys/SysHeap.h
+++ b/source/include/Kyty/Sys/SysHeap.h
@@ -4,9 +4,9 @@
 #include "Kyty/Core/Common.h"
 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
 #include "Kyty/Sys/Windows/SysWindowsHeap.h" // IWYU pragma: export
-#elif __linux__
+#elif defined(__linux__)
 #include "Kyty/Sys/Linux/SysLinuxHeap.h"     // IWYU pragma: export
-#elif __APPLE__
+#elif defined(__APPLE__)
 #include "Kyty/Sys/MacOS/SysMacOSHeap.h"     // IWYU pragma: export
 #else
 #   error "Unknown compiler"
diff --git a/source/include/Kyty/Sys/SysStdio.h b/source/include/Kyty/Sys/SysStdio.h
index bf7659e..066b2cd 100644
--- a/source/include/Kyty/Sys/SysStdio.h
+++ b/source/include/Kyty/Sys/SysStdio.h
@@ -5,9 +5,9 @@
 
 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
 #include "Kyty/Sys/Windows/SysWindowsStdio.h" //
-#elif __APPLE__
+#elif defined(__APPLE__)
 #include "Kyty/Sys/MacOS/SysMacOSStdio.h"     //
-#elif __linux__
+#elif defined(__linux__)
 #include "Kyty/Sys/Linux/SysLinuxStdio.h"     //
 #else
 #   error "Unknown compiler"
diff --git a/source/include/Kyty/Sys/SysStdlib.h b/source/include/Kyty/Sys/SysStdlib.h
index a8462df..26ac792 100644
--- a/source/include/Kyty/Sys/SysStdlib.h
+++ b/source/include/Kyty/Sys/SysStdlib.h
@@ -4,9 +4,9 @@
 #include "Kyty/Core/Common.h"
 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
 #include "Kyty/Sys/Windows/SysWindowsStdlib.h" // IWYU pragma: export
-#elif __linux__
+#elif defined(__linux__)
 #include "Kyty/Sys/Linux/SysLinuxStdlib.h"     // IWYU pragma: export
-#elif __APPLE__
+#elif defined(__APPLE__)
 #include "Kyty/Sys/MacOS/SysMacOSStdlib.h"     // IWYU pragma: export
 #else
 #   error "Unknown compiler"
diff --git a/source/include/Kyty/Sys/SysSync.h b/source/include/Kyty/Sys/SysSync.h
index 86303f2..092fafd 100644
--- a/source/include/Kyty/Sys/SysSync.h
+++ b/source/include/Kyty/Sys/SysSync.h
@@ -4,9 +4,9 @@
 #include "Kyty/Core/Common.h"
 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
 #include "Kyty/Sys/Windows/SysWindowsSync.h" // IWYU pragma: export
-#elif __linux__
+#elif defined(__linux__)
 #include "Kyty/Sys/Linux/SysLinuxSync.h"     // IWYU pragma: export
-#elif __APPLE__
+#elif defined(__APPLE__)
 #include "Kyty/Sys/MacOS/SysMacOSSync.h"     // IWYU pragma: export
 #else
 #   error "Unknown compiler"
diff --git a/source/include/Kyty/Sys/SysVirtual.h b/source/include/Kyty/Sys/SysVirtual.h
index 473902a..74d5cad 100644
--- a/source/include/Kyty/Sys/SysVirtual.h
+++ b/source/include/Kyty/Sys/SysVirtual.h
@@ -4,9 +4,9 @@
 #include "Kyty/Core/Common.h"
 #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
 #include "Kyty/Sys/Windows/SysWindowsVirtual.h" // IWYU pragma: export
-#elif __linux__
+#elif defined(__linux__)
 #include "Kyty/Sys/Linux/SysLinuxVirtual.h"     // IWYU pragma: export
-#elif __APPLE__
+#elif defined(__APPLE__)
 #include "Kyty/Sys/MacOS/SysMacOSVirtual.h"     // IWYU pragma: export
 #else
 #   error "Unknown compiler"