Patch to prevent Mini vMac from forcing the use of the discrete GPU, in two-GPU Macs

AutomaticGraphicsSwitching.patch

https://developer.apple.com/library/archive/technotes/tn2229/
--- src/Info.plist.orig	2018-06-22 00:41:55.000000000 -0500
+++ src/Info.plist	2018-06-29 13:12:51.000000000 -0500
@@ -3,4 +3,6 @@
 <plist version="1.0">
 <dict>
+	<key>NSSupportsAutomaticGraphicsSwitching</key>
+	<true/>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>English</string>
--- src/OSGLUCCO.m.orig	2018-06-09 03:53:21.000000000 -0500
+++ src/OSGLUCCO.m	2018-06-22 06:33:03.000000000 -0500
@@ -51,6 +51,8 @@
 
 typedef struct __CFError * CFErrorRef;
 
+#define NSOpenGLPFAAllowOfflineRenderers (NSOpenGLPixelFormatAttribute)96
+
 #endif
 
 #if MAC_OS_X_VERSION_10_6 > MAC_OS_X_VERSION_MAX_ALLOWED
@@ -3160,2 +3162,3 @@
 		NSOpenGLPixelFormatAttribute attr[] = {
+			NSOpenGLPFAAllowOfflineRenderers,
 			0};
@@ -3164,2 +3167,9 @@
 		fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attr];
+#if MAC_OS_X_VERSION_10_5 > MAC_OS_X_VERSION_MIN_REQUIRED
+		if (nil == fmt) {
+			/* NSOpenGLPFAAllowOfflineRenderers is not supported; remove it */
+			attr[0] = (NSOpenGLPixelFormatAttribute)0;
+			fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attr];
+		}
+#endif
 		if (nil == fmt) {
--- src/OSGLUOSX.c.orig	2018-05-25 02:41:10.000000000 -0500
+++ src/OSGLUOSX.c	2018-06-29 15:09:38.000000000 -0500
@@ -36,4 +36,14 @@
 /* --- adapting to API/ABI version differences --- */
 
+#ifndef MAC_OS_X_VERSION_10_5
+#define MAC_OS_X_VERSION_10_5 1050
+#endif
+
+#if MAC_OS_X_VERSION_10_5 > MAC_OS_X_VERSION_MAX_ALLOWED
+
+#define AGL_ALLOW_OFFLINE_RENDERERS 96
+
+#endif
+
 /*
 	if UsingCarbonLib, instead of native Macho,
@@ -2719,5 +2731,12 @@
 		&& HaveMyCGDisplayPixelsHigh())
 	{
-		static const GLint fullscreen_attrib[] = {AGL_RGBA,
+#if MAC_OS_X_VERSION_10_5 > MAC_OS_X_VERSION_MIN_REQUIRED
+		GLenum err;
+#endif
+		static
+#if MAC_OS_X_VERSION_10_5 <= MAC_OS_X_VERSION_MIN_REQUIRED
+		const
+#endif
+		GLint fullscreen_attrib[] = {AGL_RGBA,
 			AGL_NO_RECOVERY,
 			AGL_FULLSCREEN,
@@ -2726,4 +2745,5 @@
 			AGL_DOUBLEBUFFER,
 #endif
+			AGL_ALLOW_OFFLINE_RENDERERS,
 			AGL_NONE};
 		GDHandle theDevice;
@@ -2734,4 +2754,16 @@
 		fullscreen_fmt = aglChoosePixelFormat(
 			&theDevice, 1, fullscreen_attrib);
+#if MAC_OS_X_VERSION_10_5 > MAC_OS_X_VERSION_MIN_REQUIRED
+		err = aglGetError();
+		if (AGL_BAD_ATTRIBUTE == err || NULL == fullscreen_fmt) {
+			/* AGL_ALLOW_OFFLINE_RENDERERS is not supported; remove it */
+			fullscreen_attrib[5
+#if UseAGLdoublebuff
+				+ 1
+#endif
+			] = AGL_NONE;
+			fullscreen_fmt = aglChoosePixelFormat(&theDevice, 1, fullscreen_attrib);
+		}
+#endif
 		if (NULL == fullscreen_fmt) {
 			/* err = aglReportError() */
@@ -4229,9 +4261,17 @@
 
 	if (MyCreateNewWindow(&NewWinRect, &gMyMainWindow)) {
-		static const GLint window_attrib[] = {AGL_RGBA,
+#if MAC_OS_X_VERSION_10_5 > MAC_OS_X_VERSION_MIN_REQUIRED
+		GLenum err;
+#endif
+		static
+#if MAC_OS_X_VERSION_10_5 <= MAC_OS_X_VERSION_MIN_REQUIRED
+		const
+#endif
+		GLint window_attrib[] = {AGL_RGBA,
 #if UseAGLdoublebuff
 			AGL_DOUBLEBUFFER,
 #endif
 			/* AGL_DEPTH_SIZE, 16,  */
+			AGL_ALLOW_OFFLINE_RENDERERS,
 			AGL_NONE};
 
@@ -4241,4 +4281,16 @@
 
 		window_fmt = aglChoosePixelFormat(NULL, 0, window_attrib);
+#if MAC_OS_X_VERSION_10_5 > MAC_OS_X_VERSION_MIN_REQUIRED
+		err = aglGetError();
+		if (AGL_BAD_ATTRIBUTE == err || NULL == window_fmt) {
+			/* AGL_ALLOW_OFFLINE_RENDERERS is not supported; remove it */
+			window_attrib[1
+#if UseAGLdoublebuff
+				+ 1
+#endif
+			] = AGL_NONE;
+			window_fmt = aglChoosePixelFormat(NULL, 0, window_attrib);
+		}
+#endif
 		if (NULL == window_fmt) {
 			/* err = aglReportError() */