From 1b498a03cc0b4cdccbac6645d5f13cd19422d738 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 9 Jan 2022 01:02:53 +0900
Subject: [PATCH] Revert "internal/graphicsdriver/metal: Bug fix: Vsync didn't
 work on macOS"

This reverts commit 1dd13ae06e2f181d728e4733895fc69a1e59a086.

Reason: This caused FPS drop on macOS 12.0.1

Updates #1885
Closes #1939
---
 internal/graphicsdriver/metal/view_macos.go | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/internal/graphicsdriver/metal/view_macos.go b/internal/graphicsdriver/metal/view_macos.go
index 7620be8dc..5b63ded1f 100644
--- a/internal/graphicsdriver/metal/view_macos.go
+++ b/internal/graphicsdriver/metal/view_macos.go
@@ -17,24 +17,11 @@
 
 package metal
 
-// #cgo CFLAGS: -x objective-c
-// #cgo LDFLAGS: -framework Foundation
-//
-// #import <Foundation/Foundation.h>
-//
-// static int getMacOSMajorVersion() {
-//   NSOperatingSystemVersion version = [[NSProcessInfo processInfo] operatingSystemVersion];
-//   return (int)version.majorVersion;
-// }
-import "C"
-
 import (
 	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/mtl"
 	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ns"
 )
 
-var macOSMajorVersion = int(C.getMacOSMajorVersion())
-
 func (v *view) setWindow(window uintptr) {
 	// NSView can be updated e.g., fullscreen-state is switched.
 	v.window = window
@@ -57,12 +44,6 @@ func (v *view) update() {
 }
 
 func (v *view) usePresentsWithTransaction() bool {
-	// On macOS 12 (or later), do not use presentsWithTransaction, or vsync doesn't work (#1885).
-	// This works only for Metal. Unfortunately, there is not a good solution for OpenGL.
-	if macOSMajorVersion >= 12 {
-		return false
-	}
-
 	// Disable presentsWithTransaction on the fullscreen mode (#1745).
 	return !v.vsyncDisabled
 }