diff --git a/CMakeLists.txt b/CMakeLists.txt
index dc37cb0a..8fb4b773 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -210,7 +210,11 @@ if(ENABLE_CUDA)
     if(OpenCV_FOUND)
       set(ADDITIONAL_CXX_FLAGS "${ADDITIONAL_CXX_FLAGS} -DOPENCV")
     endif()
-    set(CUDA_HOST_COMPILER_FLAGS "--compiler-options \" ${ADDITIONAL_CXX_FLAGS} -fPIC -fopenmp -Ofast \"")
+    if (APPLE)
+        set(CUDA_HOST_COMPILER_FLAGS "--compiler-options \" ${ADDITIONAL_CXX_FLAGS} -fPIC -Xpreprocessor -fopenmp -Ofast \"")
+    else()
+        set(CUDA_HOST_COMPILER_FLAGS "--compiler-options \" ${ADDITIONAL_CXX_FLAGS} -fPIC -fopenmp -Ofast \"")
+    endif()
   endif()
 
   string (REPLACE ";" " " CUDA_ARCH_FLAGS_SPACE_SEPARATED "${CUDA_ARCH_FLAGS}")
diff --git a/Makefile b/Makefile
index af193714..e6a4ad73 100644
--- a/Makefile
+++ b/Makefile
@@ -97,7 +97,11 @@ COMMON+= `pkg-config --cflags opencv4 2> /dev/null || pkg-config --cflags opencv
 endif
 
 ifeq ($(OPENMP), 1)
-CFLAGS+= -fopenmp
+    ifeq ($(OS),Darwin) #MAC
+	    CFLAGS+= -Xpreprocessor -fopenmp
+	else
+		CFLAGS+= -fopenmp
+	endif
 LDFLAGS+= -lgomp
 endif