From 28d7b585c9cc64f76998dc9bff555d7d994aa207 Mon Sep 17 00:00:00 2001
From: bruvzg <7645683+bruvzg@users.noreply.github.com>
Date: Tue, 2 Nov 2021 23:50:27 +0200
Subject: [PATCH] [macOS] Enable multithreaded OpenGL engine flag when using
 multithreaded VisualServer.

---
 platform/osx/os_osx.mm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/platform/osx/os_osx.mm b/platform/osx/os_osx.mm
index 6517549283a..59f21d21e59 100644
--- a/platform/osx/os_osx.mm
+++ b/platform/osx/os_osx.mm
@@ -1682,6 +1682,11 @@ Error OS_OSX::initialize(const VideoMode &p_desired, int p_video_driver, int p_a
 	CGLSetParameter((CGLContextObj)[context CGLContextObj], kCGLCPSurfaceBackingSize, &dim[0]);
 	CGLEnable((CGLContextObj)[context CGLContextObj], kCGLCESurfaceBackingSize);
 
+	if (get_render_thread_mode() != RENDER_THREAD_UNSAFE) {
+		CGLError err = CGLEnable((CGLContextObj)[context CGLContextObj], kCGLCEMPEngine); // Enable multithreading.
+		ERR_FAIL_COND_V(err != kCGLNoError, ERR_UNAVAILABLE);
+	}
+
 	set_use_vsync(p_desired.use_vsync);
 
 	if (!is_no_window_mode_enabled()) {