diff --git a/src/plugins/styles/mac/qmacstyle_mac.mm b/src/plugins/styles/mac/qmacstyle_mac.mm
index 15dcea13bd..2bab19d682 100644
--- a/src/plugins/styles/mac/qmacstyle_mac.mm
+++ b/src/plugins/styles/mac/qmacstyle_mac.mm
@@ -429,12 +429,7 @@ static bool setupSlider(NSSlider *slider, const QStyleOptionSlider *sl)
     if (sl->minimum >= sl->maximum)
         return false;
 
-    // NSSlider seems to cache values based on tracking and the last layout of the
-    // NSView, resulting in incorrect knob rects that break the interaction with
-    // multiple sliders. So completely reinitialize the slider.
-    const auto controlSize = slider.controlSize;
-    [slider initWithFrame:sl->rect.toCGRect()];
-    slider.controlSize = controlSize;
+    slider.frame = sl->rect.toCGRect();
 
     slider.minValue = sl->minimum;
     slider.maxValue = sl->maximum;
@@ -465,14 +460,6 @@ static bool setupSlider(NSSlider *slider, const QStyleOptionSlider *sl)
     // the cell for its metrics and to draw itself.
     [slider layoutSubtreeIfNeeded];
 
-    if (sl->state & QStyle::State_Sunken) {
-        const CGRect knobRect = [slider.cell knobRectFlipped:slider.isFlipped];
-        CGPoint pressPoint;
-        pressPoint.x = CGRectGetMidX(knobRect);
-        pressPoint.y = CGRectGetMidY(knobRect);
-        [slider.cell startTrackingAt:pressPoint inView:slider];
-    }
-
     return true;
 }
 
@@ -5386,6 +5373,15 @@ void QMacStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex
                 const CGRect knobRect = [slider.cell knobRectFlipped:slider.isFlipped];
                 pressPoint.x = CGRectGetMidX(knobRect);
                 pressPoint.y = CGRectGetMidY(knobRect);
+
+                // The only way to tell a NSSlider/NSSliderCell to render as pressed
+                // is to start tracking. But this API has some weird behaviors that
+                // we have to account for. First of all, the pressed state will not
+                // be visually reflected unless we start tracking twice. And secondly
+                // if we don't track twice, the state of one render-pass will affect
+                // the render pass of other sliders, even if we set up the shared
+                // NSSlider with a new slider value.
+                [slider.cell startTrackingAt:pressPoint inView:slider];
                 [slider.cell startTrackingAt:pressPoint inView:slider];
             }
 
@@ -5490,8 +5486,12 @@ void QMacStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex
                 }
             });
 
-            if (isPressed)
+            if (isPressed) {
+                // We stop twice to be on the safe side, even if one seems to be enough.
+                // See startTracking above for why we do this.
                 [slider.cell stopTracking:pressPoint at:pressPoint inView:slider mouseIsUp:NO];
+                [slider.cell stopTracking:pressPoint at:pressPoint inView:slider mouseIsUp:NO];
+            }
         }
         break;
 #if QT_CONFIG(spinbox)