Update README.md

Author: VyvaHart

README.md

@@ -28,6 +28,8 @@ Fractals are a set of infinitely complex patterns that show self-similarity at v
   </tr>
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+**Mac Retina Display:** Coordinate handling may be inaccurate on Mac devices with Retina displays due to differences in `window.devicePixelRatio` implementation. wip... :warning:
+
 ## Basic Controls
 
 - **Mouse Scroll or Q/E**: Zoom in/out.