diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0f2fbae7..d6ea93bd6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,6 +36,11 @@ set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)
 
 set (CMAKE_CXX_STANDARD 11)
 
+if(APPLE)
+	message(WARNING "CMake is not an officially supported build system for love on Apple platforms.")
+	message(WARNING "Use the prebuilt .app or the xcode project in platform/xcode/ instead.")
+endif()
+
 if(MSVC)
 	set(LOVE_CONSOLE_EXE_NAME lovec)
 endif()
@@ -48,11 +53,15 @@ else()
 	set(LOVE_TARGET_PLATFORM x86)
 endif()
 
-option(LOVE_JIT "Use LuaJIT" TRUE)
+if(APPLE)
+	option(LOVE_JIT "Use LuaJIT" FALSE)
+else()
+	option(LOVE_JIT "Use LuaJIT" TRUE)
+endif()
 
 if(LOVE_JIT)
 	if(APPLE)
-		message(FATAL_ERROR "JIT not supported yet on Mac. Please use -DLOVE_JIT=0.")
+		message(WARNING "JIT not supported yet on Mac.")
 	endif()
 	message(STATUS "LuaJIT: Enabled")
 else()
@@ -289,6 +298,9 @@ if (APPLE)
 	set(LOVE_SRC_COMMON ${LOVE_SRC_COMMON}
 		src/common/macosx.mm
 	)
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} objc)
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} "-framework CoreFoundation")
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} "-framework AppKit")
 endif()
 
 source_group("common" FILES ${LOVE_SRC_COMMON})
@@ -1624,6 +1636,7 @@ if(APPLE)
 	set(LOVE_SRC_3P_PHYSFS ${LOVE_SRC_3P_PHYSFS}
 		src/libraries/physfs/physfs_platform_apple.m
 	)
+	set(LOVE_LINK_LIBRARIES ${LOVE_LINK_LIBRARIES} "-framework IOKit")
 endif()
 
 add_library(love_3p_physfs ${LOVE_SRC_3P_PHYSFS})
@@ -1744,6 +1757,7 @@ set(LOVE_LIB_SRC
 )
 
 include_directories(
+	BEFORE
 	src
 	src/libraries
 	src/libraries/box2D
diff --git a/src/modules/audio/openal/Audio.cpp b/src/modules/audio/openal/Audio.cpp
index 3f8193f2c..68645e351 100644
--- a/src/modules/audio/openal/Audio.cpp
+++ b/src/modules/audio/openal/Audio.cpp
@@ -100,11 +100,6 @@ Audio::Audio()
 	, poolThread(nullptr)
 	, distanceModel(DISTANCE_INVERSE_CLAMPED)
 {
-#if defined(LOVE_LINUX)
-	// Temporarly block signals, as the thread inherits this mask
-	love::thread::disableSignals();
-#endif
-
 	// Before opening new device, check if recording
 	// is requested.
 	if (getRequestRecordingPermission())
@@ -114,29 +109,32 @@ Audio::Audio()
 			requestRecordingPermission();
 	}
 
-	// Passing null for default device.
-	device = alcOpenDevice(nullptr);
+	{
+#if defined(LOVE_LINUX)
+		// Temporarly block signals, as the thread inherits this mask
+		love::thread::ScopedDisableSignals disableSignals;
+#endif
 
-	if (device == nullptr)
-		throw love::Exception("Could not open device.");
+		// Passing null for default device.
+		device = alcOpenDevice(nullptr);
+
+		if (device == nullptr)
+			throw love::Exception("Could not open device.");
 
 #ifdef ALC_EXT_EFX
-	ALint attribs[4] = { ALC_MAX_AUXILIARY_SENDS, MAX_SOURCE_EFFECTS, 0, 0 };
+		ALint attribs[4] = { ALC_MAX_AUXILIARY_SENDS, MAX_SOURCE_EFFECTS, 0, 0 };
 #else
-	ALint *attribs = nullptr;
+		ALint *attribs = nullptr;
 #endif
 
-	context = alcCreateContext(device, attribs);
+		context = alcCreateContext(device, attribs);
 
-	if (context == nullptr)
-		throw love::Exception("Could not create context.");
+		if (context == nullptr)
+			throw love::Exception("Could not create context.");
 
-	if (!alcMakeContextCurrent(context) || alcGetError(device) != ALC_NO_ERROR)
-		throw love::Exception("Could not make context current.");
-
-#if defined(LOVE_LINUX)
-	love::thread::reenableSignals();
-#endif
+		if (!alcMakeContextCurrent(context) || alcGetError(device) != ALC_NO_ERROR)
+			throw love::Exception("Could not make context current.");
+	}
 
 #ifdef ALC_EXT_EFX
 	initializeEFX();
diff --git a/src/modules/system/System.cpp b/src/modules/system/System.cpp
index 55980b4a2..800bf5866 100644
--- a/src/modules/system/System.cpp
+++ b/src/modules/system/System.cpp
@@ -164,7 +164,7 @@ bool System::openURL(const std::string &url) const
 
 #endif
 
-	return (int) result > 32;
+	return (ptrdiff_t) result > 32;
 
 #endif
 }
diff --git a/src/modules/thread/LuaThread.cpp b/src/modules/thread/LuaThread.cpp
index 2a6cb12cc..9ae4ab0bd 100644
--- a/src/modules/thread/LuaThread.cpp
+++ b/src/modules/thread/LuaThread.cpp
@@ -37,6 +37,7 @@ love::Type LuaThread::type("Thread", &Threadable::type);
 LuaThread::LuaThread(const std::string &name, love::Data *code)
 	: code(code)
 	, name(name)
+	, haserror(false)
 {
 	threadName = name;
 }
@@ -48,6 +49,7 @@ LuaThread::~LuaThread()
 void LuaThread::threadFunction()
 {
 	error.clear();
+	haserror = false;
 
 	lua_State *L = luaL_newstate();
 	luaL_openlibs(L);
@@ -71,7 +73,10 @@ void LuaThread::threadFunction()
 	int tracebackidx = lua_gettop(L);
 
 	if (luaL_loadbuffer(L, (const char *) code->getData(), code->getSize(), name.c_str()) != 0)
+	{
 		error = luax_tostring(L, -1);
+		haserror = true;
+	}
 	else
 	{
 		int pushedargs = (int) args.size();
@@ -82,18 +87,27 @@ void LuaThread::threadFunction()
 		args.clear();
 
 		if (lua_pcall(L, pushedargs, 0, tracebackidx) != 0)
+		{
 			error = luax_tostring(L, -1);
+			haserror = true;
+		}
 	}
 
 	lua_close(L);
 
-	if (!error.empty())
+	if (haserror)
 		onError();
 }
 
 bool LuaThread::start(const std::vector<Variant> &args)
 {
+	if (isRunning())
+		return false;
+
 	this->args = args;
+	error.clear();
+	haserror = false;
+	
 	return Threadable::start();
 }
 
@@ -104,9 +118,6 @@ const std::string &LuaThread::getError() const
 
 void LuaThread::onError()
 {
-	if (error.empty())
-		return;
-
 	auto eventmodule = Module::getInstance<event::Event>(Module::M_EVENT);
 	if (!eventmodule)
 		return;
diff --git a/src/modules/thread/LuaThread.h b/src/modules/thread/LuaThread.h
index e8d625cb7..9e707b784 100644
--- a/src/modules/thread/LuaThread.h
+++ b/src/modules/thread/LuaThread.h
@@ -46,6 +46,7 @@ public:
 	virtual ~LuaThread();
 	void threadFunction();
 	const std::string &getError() const;
+	bool hasError() const { return haserror; }
 
 	bool start(const std::vector<Variant> &args);
 
@@ -56,6 +57,7 @@ private:
 	StrongRef<love::Data> code;
 	std::string name;
 	std::string error;
+	bool haserror;
 
 	std::vector<Variant> args;
 
diff --git a/src/modules/thread/sdl/Thread.cpp b/src/modules/thread/sdl/Thread.cpp
index cfc63e31f..71f28e4ac 100644
--- a/src/modules/thread/sdl/Thread.cpp
+++ b/src/modules/thread/sdl/Thread.cpp
@@ -44,7 +44,7 @@ bool Thread::start()
 {
 #if defined(LOVE_LINUX)
 	// Temporarly block signals, as the thread inherits this mask
-	love::thread::disableSignals();
+	love::thread::ScopedDisableSignals disableSignals;
 #endif
 
 	Lock l(mutex);
@@ -55,9 +55,6 @@ bool Thread::start()
 	thread = SDL_CreateThread(thread_runner, t->getThreadName(), this);
 	running = (thread != nullptr);
 
-#if defined(LOVE_LINUX)
-	love::thread::reenableSignals();
-#endif
 	return running;
 }
 
diff --git a/src/modules/thread/threads.h b/src/modules/thread/threads.h
index 5f607bade..827ca8586 100644
--- a/src/modules/thread/threads.h
+++ b/src/modules/thread/threads.h
@@ -132,6 +132,12 @@ Thread *newThread(Threadable *t);
 #if defined(LOVE_LINUX)
 void disableSignals();
 void reenableSignals();
+
+struct ScopedDisableSignals
+{
+	ScopedDisableSignals() { disableSignals(); }
+	~ScopedDisableSignals() { reenableSignals(); }
+};
 #endif
 
 } // thread
diff --git a/src/modules/thread/wrap_LuaThread.cpp b/src/modules/thread/wrap_LuaThread.cpp
index db29c1a65..fe15befbc 100644
--- a/src/modules/thread/wrap_LuaThread.cpp
+++ b/src/modules/thread/wrap_LuaThread.cpp
@@ -63,11 +63,10 @@ int w_Thread_wait(lua_State *L)
 int w_Thread_getError(lua_State *L)
 {
 	LuaThread *t = luax_checkthread(L, 1);
-	std::string err = t->getError();
-	if (err.empty())
-		lua_pushnil(L);
+	if (t->hasError())
+		luax_pushstring(L, t->getError());
 	else
-		luax_pushstring(L, err);
+		lua_pushnil(L);
 	return 1;
 }