Is there an OS X application that overlays a grid onto the screen?

The xScope app is a veritable powerhouse of overlay, measurement and screen detail functionality.

You should be able to set up multiple grid lines if that is what you want.

  • http://xscopeapp.com/guide#guides

This app has paid for itself tenfold over the years. Super useful for color and measurement and, of course, grids.


Red Line Tools is a free app which allows you to add various elements to the screen, such as: lines, grid, layout, and various image overlays on top of all windows.

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