Prefer integrated GPU

pacman.c.diff

diff --git a/sokol/sokol_app.h b/sokol/sokol_app.h
index 0115970..149c336 100644
--- a/sokol/sokol_app.h
+++ b/sokol/sokol_app.h
@@ -3016,7 +3016,17 @@ _SOKOL_PRIVATE void _sapp_macos_frame(void) {
     _sapp.macos.win_dlg = [[_sapp_macos_window_delegate alloc] init];
     _sapp.macos.window.delegate = _sapp.macos.win_dlg;
     #if defined(SOKOL_METAL)
-        _sapp.macos.mtl_device = MTLCreateSystemDefaultDevice();
+        id<MTLDevice> chosen = nil;
+        for (id<MTLDevice> device in MTLCopyAllDevices()) {
+            if (device.isLowPower) {
+                chosen = device;
+                break;
+            }
+        }
+        if (!chosen) {
+            chosen = MTLCreateSystemDefaultDevice();
+        }
+        _sapp.macos.mtl_device = chosen;
         _sapp.macos.view = [[_sapp_macos_view alloc] init];
         [_sapp.macos.view updateTrackingAreas];
         _sapp.macos.view.preferredFramesPerSecond = 60 / _sapp.swap_interval;