1 files changed, 18 insertions, 0 deletions
diff --git a/src/quick/scenegraph/qsgrhisupport.cpp b/src/quick/scenegraph/qsgrhisupport.cpp
index c523bff702..fe3b626077 100644
--- a/src/quick/scenegraph/qsgrhisupport.cpp
+++ b/src/quick/scenegraph/qsgrhisupport.cpp
@@ -225,6 +225,24 @@ void QSGRhiSupport::adjustToPlatformQuirks()
             m_rhiBackend = QRhi::OpenGLES2;
         }
     }
+#elif defined(Q_OS_MACOS) || defined(Q_OS_IOS)
+
+    // ### For now just create a throwaway QRhi instance. This will be replaced
+    // by a more lightweight way, once a helper function is added gui/rhi.
+
+    // A macOS VM may not have Metal support at all. We have to decide at this
+    // point, it will be too late afterwards, and the only way is to see if
+    // MTLCreateSystemDefaultDevice succeeds.
+    if (m_rhiBackend == QRhi::Metal) {
+        QRhiMetalInitParams rhiParams;
+        QRhi *tempRhi = QRhi::create(m_rhiBackend, &rhiParams, {});
+        if (!tempRhi) {
+            m_rhiBackend = QRhi::OpenGLES2;
+            qCDebug(QSG_LOG_INFO, "Metal does not seem to be supported. Falling back to OpenGL.");
+        } else {
+            delete tempRhi;
+        }
+    }
 #endif
 }