Allow building with macOS 10.14 SDK (will still warn about
"instance method '-charactersByApplyingModifiers:' not found"
and "instance method '-location' not found")

Upstream-Status: Inappropriate [violates DRY]

--- src/gui/platform/darwin/qapplekeymapper.mm.orig
+++ src/gui/platform/darwin/qapplekeymapper.mm
@@ -528,7 +528,7 @@
                 // we first run the event through the Carbon APIs and then
                 // compare the results to Cocoa.
                 auto cocoaModifiers = toCocoaModifiers(qtModifiers);
-                auto *charactersWithModifiers = [NSApp.currentEvent charactersByApplyingModifiers:cocoaModifiers];
+                NSString *charactersWithModifiers = [NSApp.currentEvent charactersByApplyingModifiers:cocoaModifiers];
 
                 QChar cocoaUnicodeKey;
                 if (charactersWithModifiers.length > 0)
--- src/gui/rhi/qrhimetal.mm.orig
+++ src/gui/rhi/qrhimetal.mm
@@ -369,15 +369,15 @@
     driverInfoStruct.deviceType = QRhiDriverInfo::IntegratedDevice;
 #else
     if (@available(macOS 10.15, *)) {
-        const MTLDeviceLocation deviceLocation = [d->dev location];
+        const NSUInteger deviceLocation = (NSUInteger)[d->dev location];
         switch (deviceLocation) {
-        case MTLDeviceLocationBuiltIn:
+        case 0:
             driverInfoStruct.deviceType = QRhiDriverInfo::IntegratedDevice;
             break;
-        case MTLDeviceLocationSlot:
+        case 1:
             driverInfoStruct.deviceType = QRhiDriverInfo::DiscreteDevice;
             break;
-        case MTLDeviceLocationExternal:
+        case 2:
             driverInfoStruct.deviceType = QRhiDriverInfo::ExternalDevice;
             break;
         default:
@@ -403,8 +403,10 @@
 #if defined(Q_OS_MACOS)
     caps.maxTextureSize = 16384;
     caps.baseVertexAndInstance = true;
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101500
     if (@available(macOS 10.15, *))
-        caps.isAppleGPU = [d->dev supportsFamily:MTLGPUFamilyApple7];
+        caps.isAppleGPU = [d->dev supportsFamily:MTLGPUFamily(1007)]; // MTLGPUFamilyApple7
+#endif
     caps.maxThreadGroupSize = 1024;
 #elif defined(Q_OS_TVOS)
     if ([d->dev supportsFeatureSet: MTLFeatureSet(30003)]) // MTLFeatureSet_tvOS_GPUFamily2_v1
@@ -2543,6 +2545,26 @@
         return srgb ? MTLPixelFormatASTC_12x10_sRGB : MTLPixelFormatASTC_12x10_LDR;
     case QRhiTexture::ASTC_12x12:
         return srgb ? MTLPixelFormatASTC_12x12_sRGB : MTLPixelFormatASTC_12x12_LDR;
+#elif MAC_OS_X_VERSION_MAX_ALLOWED < 110000
+    case QRhiTexture::ETC2_RGB8:
+    case QRhiTexture::ETC2_RGB8A1:
+    case QRhiTexture::ETC2_RGBA8:
+    case QRhiTexture::ASTC_4x4:
+    case QRhiTexture::ASTC_5x4:
+    case QRhiTexture::ASTC_5x5:
+    case QRhiTexture::ASTC_6x5:
+    case QRhiTexture::ASTC_6x6:
+    case QRhiTexture::ASTC_8x5:
+    case QRhiTexture::ASTC_8x6:
+    case QRhiTexture::ASTC_8x8:
+    case QRhiTexture::ASTC_10x5:
+    case QRhiTexture::ASTC_10x6:
+    case QRhiTexture::ASTC_10x8:
+    case QRhiTexture::ASTC_10x10:
+    case QRhiTexture::ASTC_12x10:
+    case QRhiTexture::ASTC_12x12:
+        qWarning("QRhiMetal: ETC2 compression not supported on this platform");
+        return MTLPixelFormatInvalid;
 #else
     case QRhiTexture::ETC2_RGB8:
         if (d->caps.isAppleGPU) {
@@ -2727,6 +2747,7 @@
     switch (m_type) {
     case DepthStencil:
 #ifdef Q_OS_MACOS
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 110000
         if (rhiD->caps.isAppleGPU) {
             if (@available(macOS 11.0, *)) {
                 desc.storageMode = MTLStorageModeMemoryless;
@@ -2735,10 +2756,13 @@
                 Q_UNREACHABLE();
             }
         } else {
+#endif
             desc.storageMode = MTLStorageModePrivate;
             d->format = rhiD->d->dev.depth24Stencil8PixelFormatSupported
                     ? MTLPixelFormatDepth24Unorm_Stencil8 : MTLPixelFormatDepth32Float_Stencil8;
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 110000
         }
+#endif
 #else
         desc.storageMode = MTLStorageModeMemoryless;
         d->format = MTLPixelFormatDepth32Float_Stencil8;
--- src/plugins/platforms/cocoa/qcocoascreen.mm.orig	2023-02-14 09:26:04.000000000 +0100
+++ src/plugins/platforms/cocoa/qcocoascreen.mm	2023-12-28 11:31:59.000000000 +0100
@@ -271,9 +271,11 @@
     float refresh = CGDisplayModeGetRefreshRate(displayMode);
     m_refreshRate = refresh > 0 ? refresh : 60.0;
 
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101500
     if (@available(macOS 10.15, *))
         m_name = QString::fromNSString(nsScreen.localizedName);
     else
+#endif
         m_name = displayName(m_displayId);
 
     const bool didChangeGeometry = m_geometry != previousGeometry || m_availableGeometry != previousAvailableGeometry;