HG util: fix atomic_long type on MacOS
@@ -33,7 +33,7 @@ typedef OPA_ptr_t hg_atomic_int64_t; /* OPA has only limited 64-bit support */
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
# include <stdatomic.h>
typedef atomic_int hg_atomic_int32_t;
-# if HG_UTIL_ATOMIC_LONG_WIDTH == 8
+# if (HG_UTIL_ATOMIC_LONG_WIDTH == 8) && !defined(__APPLE__)
typedef atomic_long hg_atomic_int64_t;
# else
typedef atomic_llong hg_atomic_int64_t;
