diff --git a/platform-darwin/Source/Mac/MPSitesWindowController.xib b/platform-darwin/Source/Mac/MPSitesWindowController.xib
index d59d0c11..3b321c21 100644
--- a/platform-darwin/Source/Mac/MPSitesWindowController.xib
+++ b/platform-darwin/Source/Mac/MPSitesWindowController.xib
@@ -34,7 +34,7 @@
                 <rect key="frame" x="0.0" y="0.0" width="640" height="557"/>
                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                 <subviews>
-                    <visualEffectView blendingMode="behindWindow" material="fullScreenUI" state="followsWindowActiveState" translatesAutoresizingMaskIntoConstraints="NO" id="eRe-Ef-AZx">
+                    <visualEffectView blendingMode="behindWindow" material="popover" state="followsWindowActiveState" translatesAutoresizingMaskIntoConstraints="NO" id="eRe-Ef-AZx">
                         <rect key="frame" x="0.0" y="0.0" width="640" height="557"/>
                     </visualEffectView>
                     <progressIndicator hidden="YES" wantsLayer="YES" horizontalHuggingPriority="750" verticalHuggingPriority="750" maxValue="100" displayedWhenStopped="NO" bezeled="NO" indeterminate="YES" controlSize="small" style="spinning" translatesAutoresizingMaskIntoConstraints="NO" id="oSh-Ec-8Nf" userLabel="Progress Spinner">