diff --git a/src/gui/rhi/qrhi.cpp b/src/gui/rhi/qrhi.cpp
index 58bbc349419..f2e899651bd 100644
--- a/src/gui/rhi/qrhi.cpp
+++ b/src/gui/rhi/qrhi.cpp
@@ -7256,12 +7256,13 @@ QRhiRenderTarget *QRhiSwapChain::currentFrameRenderTarget(StereoTargetBuffer tar
         } luminanceInNits;
     \endcode
 
-    Whereas for macOS/iOS, the maximum color component value (e.g. supposedly
-    something larger than 1.0f) is provided:
+    Whereas for macOS/iOS, the current maximum and potential maximum color
+    component values are provided:
 
     \code
         struct {
             float maxColorComponentValue;
+            float maxPotentialColorComponentValue;
         } colorComponentValue;
     \endcode
 
@@ -7306,6 +7307,7 @@ QDebug operator<<(QDebug dbg, const QRhiSwapChainHdrInfo &info)
         break;
     case QRhiSwapChainHdrInfo::ColorComponentValue:
         dbg.nospace() << " maxColorComponentValue=" << info.limits.colorComponentValue.maxColorComponentValue;
+        dbg.nospace() << " maxPotentialColorComponentValue=" << info.limits.colorComponentValue.maxPotentialColorComponentValue;
         break;
     }
     dbg.nospace() << ')';
diff --git a/src/gui/rhi/qrhi.h b/src/gui/rhi/qrhi.h
index 8ec6630acfe..eb300f5873b 100644
--- a/src/gui/rhi/qrhi.h
+++ b/src/gui/rhi/qrhi.h
@@ -1485,6 +1485,7 @@ struct QRhiSwapChainHdrInfo
         } luminanceInNits;
         struct {
             float maxColorComponentValue;
+            float maxPotentialColorComponentValue;
         } colorComponentValue;
     } limits;
 };
diff --git a/src/gui/rhi/qrhimetal.mm b/src/gui/rhi/qrhimetal.mm
index 4edf0ac865e..4a4da81b862 100644
--- a/src/gui/rhi/qrhimetal.mm
+++ b/src/gui/rhi/qrhimetal.mm
@@ -6338,12 +6338,16 @@ QRhiSwapChainHdrInfo QMetalSwapChain::hdrInfo()
         // Must use m_window, not window, given this may be called before createOrResize().
 #ifdef Q_OS_MACOS
         NSView *view = reinterpret_cast<NSView *>(m_window->winId());
-        info.limits.colorComponentValue.maxColorComponentValue = view.window.screen.maximumExtendedDynamicRangeColorComponentValue;
+        NSScreen *screen = view.window.screen;
+        info.limits.colorComponentValue.maxColorComponentValue = screen.maximumExtendedDynamicRangeColorComponentValue;
+        info.limits.colorComponentValue.maxPotentialColorComponentValue = screen.maximumPotentialExtendedDynamicRangeColorComponentValue;
         info.isHardCodedDefaults = false;
 #else
         if (@available(iOS 16.0, *)) {
             UIView *view = reinterpret_cast<UIView *>(m_window->winId());
+            UIScreen *screen = view.window.windowScene.screen;
             info.limits.colorComponentValue.maxColorComponentValue = view.window.windowScene.screen.currentEDRHeadroom;
+            info.limits.colorComponentValue.maxPotentialColorComponentValue = screen.potentialEDRHeadroom;
             info.isHardCodedDefaults = false;
         }
 #endif