internal/graphicsdriver/metal: update the minimum version of macOS

Updates #2095

internal/graphicsdriver/metal/ca/ca_darwin.go

@@ -30,7 +30,7 @@ import (
 // It is because old Xcode (8 or older?) does not accept @available syntax.
 
 // #cgo CFLAGS: -Wno-unguarded-availability-new
-// #cgo !ios CFLAGS: -mmacosx-version-min=10.12
+// #cgo !ios CFLAGS: -mmacosx-version-min=10.14
 // #cgo LDFLAGS: -framework QuartzCore -framework Foundation -framework CoreGraphics
 //
 // #include "ca_darwin.h"

internal/graphicsdriver/metal/graphics_darwin.go

@@ -29,7 +29,7 @@ import (
 )
 
 // #cgo CFLAGS: -x objective-c
-// #cgo !ios CFLAGS: -mmacosx-version-min=10.12
+// #cgo !ios CFLAGS: -mmacosx-version-min=10.14
 // #cgo LDFLAGS: -framework Foundation
 //
 // #import <Foundation/Foundation.h>

internal/graphicsdriver/metal/mtl/mtl_darwin.go

@@ -14,7 +14,7 @@
 
 // Package mtl provides access to Apple's Metal API (https://developer.apple.com/documentation/metal).
 //
-// Package mtl requires macOS version 10.13 or newer.
+// Package mtl requires macOS version 10.14 or newer.
 //
 // This package is in very early stages of development.
 // The API will change when opportunities for improvement are discovered; it is not yet frozen.
@@ -28,7 +28,7 @@ import (
 	"unsafe"
 )
 
-// #cgo !ios CFLAGS: -mmacosx-version-min=10.12
+// #cgo !ios CFLAGS: -mmacosx-version-min=10.14
 // #cgo LDFLAGS: -framework Metal -framework CoreGraphics -framework Foundation
 //
 // #include "mtl_darwin.h"

internal/graphicsdriver/metal/ns/ns_darwin.go

@@ -25,7 +25,7 @@ import (
 	"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ca"
 )
 
-// #cgo !ios CFLAGS: -mmacosx-version-min=10.12
+// #cgo !ios CFLAGS: -mmacosx-version-min=10.14
 //
 // #include "ns_darwin.h"
 import "C"