From cf1a5901fccafdaead225b0a5e55ff74fdcf9678 Mon Sep 17 00:00:00 2001
From: Michael Buckley <michael@buckleyisms.com>
Date: Wed, 17 Nov 2021 19:22:00 -0800
Subject: [PATCH] Mac: prefer integrated GPU

---
 macosx/mac-os.mm | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/macosx/mac-os.mm b/macosx/mac-os.mm
index 938a4b88..2c180f74 100644
--- a/macosx/mac-os.mm
+++ b/macosx/mac-os.mm
@@ -3119,6 +3119,23 @@ void QuitWithFatalError ( NSString *message)
 	[s9xView addConstraint:[NSLayoutConstraint constraintWithItem:s9xView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:SNES_HEIGHT * 2.0]];
 	s9xView.device = MTLCreateSystemDefaultDevice();
 	S9xInitDisplay(NULL, NULL);
+
+	id<MTLDevice> device = nil;
+	for ( id<MTLDevice> candidate in MTLCopyAllDevices() )
+	{
+		if ( candidate.isLowPower )
+		{
+			device = candidate;
+			break;
+		}
+	}
+
+	if ( device == nil )
+	{
+		device = MTLCreateSystemDefaultDevice();
+	}
+
+	s9xView.device = device;
 }
 
 - (void)start