CMake Could NOT find OpenMP in Clion

Question

I am trying to compile an OpenMP prject in Clion on Mac.

I have tried

How to set up basic openMP project in CLion

How to set linker flags for OpenMP in CMake's try_compile function

CMake cannot find OpenMP

But they all don't work for me. Clion just says:

-- Could NOT find OpenMP_C (missing: OpenMP_C_FLAGS OpenMP_C_LIB_NAMES)

-- Could NOT find OpenMP_CXX (missing: OpenMP_CXX_FLAGS OpenMP_CXX_LIB_NAMES)

-- Could NOT find OpenMP (missing: OpenMP_C_FOUND OpenMP_CXX_FOUND)

I also tried compile it using "gcc -o main -fopenmp main.c" in the command line and it works fine.

Here is the code:

#include <stdio.h>
#include <omp.h>
int main() {
printf("Hello, World!\n");
#pragma omp parallel
printf("Hello world from thread %d\n",omp_get_thread_num());
return 0;
}