diff --git a/vcl/osx/salframeview.mm b/vcl/osx/salframeview.mm
index e556bf38bb35..d44411fb56f2 100644
--- a/vcl/osx/salframeview.mm
+++ b/vcl/osx/salframeview.mm
@@ -765,11 +765,19 @@ private:
 
         if( bNewSeries )
             mfMagnifyDeltaSum = 0.0;
+#if MAC_OS_X_VERSION_MAX_ALLOWED < 1060
+        mfMagnifyDeltaSum += [pEvent deltaZ];
+#else
         mfMagnifyDeltaSum += [pEvent magnification];
+#endif
 
-		mfLastMagnifyTime = [pEvent timestamp];
-		// TODO: change to 0.1 when COMMAND_WHEEL_ZOOM handlers allow finer zooming control
-		static const float fMagnifyFactor = 0.25*500;
+        mfLastMagnifyTime = [pEvent timestamp];
+// TODO: change to 0.1 when COMMAND_WHEEL_ZOOM handlers allow finer zooming control
+#if MAC_OS_X_VERSION_MAX_ALLOWED < 1060
+        static const float fMagnifyFactor = 0.25;
+#else
+        static const float fMagnifyFactor = 0.25*500; // steps are 500 times smaller for -magnification
+#endif
         static const float fMinMagnifyStep = 15.0 / fMagnifyFactor;
         if( fabs(mfMagnifyDeltaSum) <= fMinMagnifyStep )
             return;