diff --git a/apps/desktop/src-tauri/src/capture/src/quartz/capturer.rs b/apps/desktop/src-tauri/src/capture/src/quartz/capturer.rs
index 6d83f693..5dd74761 100644
--- a/apps/desktop/src-tauri/src/capture/src/quartz/capturer.rs
+++ b/apps/desktop/src-tauri/src/capture/src/quartz/capturer.rs
@@ -56,6 +56,10 @@ impl Capturer {
             stream
         };
 
+        if queue.is_null() {
+            return Err(CGError::Failure);
+        }
+
         match unsafe { CGDisplayStreamStart(stream) } {
             CGError::Success => Ok(Capturer {
                 stream, queue, width, height, format, display