commit https://github.com/vim/vim/commit/703a8044b5393d37d355b0b1054a9a5a13912a3f Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 4 16:24:32 2016 +0200 patch 7.4.1890 Problem: GUI: When channel data is received the cursor blinking is interrupted. (Ramel Eshed) Solution: Don't update the cursor when it is blinking.

--- a/src/gui_mac.c
+++ b/src/gui_mac.c
@@ -5114,6 +5114,11 @@ gui_mch_destroy_scrollbar(scrollbar_T *s
 #endif
 }
 
+    int
+gui_mch_is_blinking(void)
+{
+    return FALSE;
+}
 
 /*
  * Cursor blink functions.