diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7a4b36b6..72626ef6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -251,7 +251,7 @@ if (WIN32)
   endif()
 endif()
 
-if (UNIX)
+if (UNIX AND NOT APPLE)
   set(THREADS_PREFER_PTHREAD_FLAG TRUE)
   find_package(Threads)
   target_link_libraries(ixwebsocket PRIVATE Threads::Threads)