Font settings for OS X on a large screen TV

"Unfortunately, there isn't an easy way to do this in System Preferences. This post describes a method using the following command in the Terminal:

defaults write NSGlobalDomain AppleDisplayScaleFactor 1.5

where 1.5 is a scaling factor you'll need to play around with. It will apply to newly opened applications. It may not change every font for every application, though."