If you’re a Mac user running an external display, you may be interested in knowing what the displays refresh rate is. For whatever reason, refresh rate is hidden from easy view in the places you might think to look, but with a little effort you can show the refresh rate on display connected to a Mac.

Knowing the refresh rate of a display can be helpful for many reasons, particularly if you want to be sure you’re using the displays native refresh rate. Perhaps you connected an external display to a Mac and find the monitor is laggy or choppy, or the cursor…