I'm normally using Optima when working on Retina displays (because of serif typeface). Screenshot [1] of some old project for solving Project Euler problems (no

I'm normally using Optima when working on Retina displays (because of serif typeface). Screenshot [1] of some old project for solving Project Euler problems (no solutions can be found in the screenshot). [1] http://imgur.com/a/JiYhD http://imgur.com/a/JiYhD