diff --git a/examples/ThirdPartyLibs/glad/glad/gl.h b/examples/ThirdPartyLibs/glad/glad/gl.h
index 3d08b2d45..0dfb4d9c8 100644
--- a/examples/ThirdPartyLibs/glad/glad/gl.h
+++ b/examples/ThirdPartyLibs/glad/glad/gl.h
@@ -2007,12 +2007,16 @@ typedef khronos_ssize_t GLsizeiptr;
 #if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ > 1060)
 	typedef long GLintptrARB;
 #else
+#ifndef __gltypes_h_
 typedef ptrdiff_t GLintptrARB;
 #endif
+#endif
 #if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ > 1060)
 	typedef long GLsizeiptrARB;
 #else
+#ifndef __gltypes_h_
 typedef ptrdiff_t GLsizeiptrARB;
+#endif
 #endif
 	typedef int64_t GLint64EXT;
 	typedef uint64_t GLuint64EXT;
diff --git a/setup.py b/setup.py
index 56cc7887f..82fd4059c 100644
--- a/setup.py
+++ b/setup.py
@@ -50,7 +50,7 @@ def parallelCCompile(self,
     newcc_args = cc_args
     if _platform == "darwin":
       if src.endswith('.cpp'):
-        newcc_args = cc_args + ["-stdlib=libc++"]
+        newcc_args = cc_args + ["-mmacosx-version-min=10.7", "-stdlib=libc++"]
     self._compile(obj, src, ext, newcc_args, extra_postargs, pp_opts)
 
   # convert to list, imap is evaluated on-demand
@@ -417,7 +417,7 @@ elif _platform == "win32":
   +["examples/ThirdPartyLibs/glad/gl.c"]
 elif _platform == "darwin":
   print("darwin!")
-  os.environ['LDFLAGS'] = '-framework Cocoa -stdlib=libc++ -framework OpenGL'
+  os.environ['LDFLAGS'] = '-framework Cocoa -mmacosx-version-min=10.7 -stdlib=libc++ -framework OpenGL'
   CXX_FLAGS += '-DB3_NO_PYTHON_FRAMEWORK '
   CXX_FLAGS += '-DHAS_SOCKLEN_T '
   CXX_FLAGS += '-D_DARWIN '