--- setup.py.orig	2021-12-27 23:56:37.000000000 -0500
+++ setup.py	2021-12-27 23:58:19.000000000 -0500
@@ -301,8 +301,10 @@
         ("PYMOL_OPENMP", None),
     ]
     if MAC:
-        ext_comp_args += ["-Xpreprocessor", "-fopenmp"]
+        ext_comp_args += ["-Xpreprocessor", "-fopenmp", "-fopenmp-version=40"]
+        inc_dirs += ['@PREFIX@/include/libomp']
         libs += ["omp"]
+        ext_link_args += ["-L@PREFIX@/lib/libomp"]
     elif WIN:
         ext_comp_args += ["/openmp"]
     else: