diff --git a/modules/gui/macosx/library/VLCLibraryWindow.m b/modules/gui/macosx/library/VLCLibraryWindow.m
index 770120238d12..613201f5c9d7 100644
--- a/modules/gui/macosx/library/VLCLibraryWindow.m
+++ b/modules/gui/macosx/library/VLCLibraryWindow.m
@@ -194,10 +194,6 @@ - (void)awakeFromNib
 - (void)dealloc
 {
     [NSNotificationCenter.defaultCenter removeObserver:self];
-    if (@available(macOS 10.14, *)) {
-        [NSApplication.sharedApplication removeObserver:self forKeyPath:@"effectiveAppearance"];
-    }
-
     libvlc_int_t *libvlc = vlc_object_instance(getIntf());
     var_DelCallback(libvlc, "intf-toggle-fscontrol", ShowFullscreenController, (__bridge void *)self);
     var_DelCallback(libvlc, "intf-show", ShowController, (__bridge void *)self);