diff --git a/apps/ui/src/components/layout/sidebar/components/sidebar-header.tsx b/apps/ui/src/components/layout/sidebar/components/sidebar-header.tsx
index 6e75e975..184b8f82 100644
--- a/apps/ui/src/components/layout/sidebar/components/sidebar-header.tsx
+++ b/apps/ui/src/components/layout/sidebar/components/sidebar-header.tsx
@@ -5,7 +5,7 @@ import { BugReportButton } from './bug-report-button';
 
 // Detect if running on macOS for traffic light button spacing
 const isMac =
-  typeof navigator !== 'undefined' && navigator.platform.toUpperCase().indexOf('MAC') >= 0;
+  typeof navigator !== 'undefined' && navigator.userAgentData?.platform === 'macOS';
 
 interface SidebarHeaderProps {
   sidebarOpen: boolean;