matplotlib
diff --git a/‎src/_macosx.m
Copy file name to clipboardExpand all lines: src/_macosx.m
+11-12Lines changed: 11 additions & 12 deletions b/‎src/_macosx.m
Copy file name to clipboardExpand all lines: src/_macosx.m
+11-12Lines changed: 11 additions & 12 deletions
@@ -1770,19 +1770,18 @@ - (void)flagsChanged:(NSEvent *)event
     }
 
     // hold a reference to the timer so we can invalidate/stop it later
-    self->timer = [NSTimer timerWithTimeInterval: interval
-                                         repeats: !single
-                                           block: ^(NSTimer *timer) {
-        gil_call_method((PyObject*)self, "_on_timer");
-        if (single) {
-            // A single-shot timer will be automatically invalidated when it fires, so
-            // we shouldn't do it ourselves when the object is deleted.
-            self->timer = NULL;
-        }
+    self->timer = [NSTimer scheduledTimerWithTimeInterval: interval
+                                                  repeats: !single
+                                                    block: ^(NSTimer *timer) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            gil_call_method((PyObject*)self, "_on_timer");
+            if (single) {
+                // A single-shot timer will be automatically invalidated when it fires, so
+                // we shouldn't do it ourselves when the object is deleted.
+                self->timer = NULL;
+            }
+        });
     }];
-    // Schedule the timer on the main run loop which is needed
-    // when updating the UI from a background thread
-    [[NSRunLoop mainRunLoop] addTimer: self->timer forMode: NSRunLoopCommonModes];
 
 exit:
     Py_XDECREF(py_interval);