Whenever I launch an app on my Mac for the first time I immediately launch the preferences and change the default font settings. As I’ve aged so have my eyes, so I need to increase the size (the super high resolution monitors haven’t helped my eyes, sure the picture looks great but everything is even smaller!).
And I generally change the font face to Calibri which might be among the great things Microsoft has ever created. I don’t know why I love this font, but I do.
Good job, Microsoft typography team!