If you’re using non-Retina -ready apps like Word and you’d like to see things in a clearer light, there’s an app for that. Retinizer is a very simple app that allows you to update standard Mac applications to support Retina displays. Mostly this means that the fonts are much sharper but icons and UI elements are often still fuzzy.
For example, Word looks much better after Retinization although the rulers and buttons are still janky. It didn’t work with Air apps very well and some apps didn’t update at all, including BBEdit and Twitter.
The creator, Mikel Pr, writes:
You can also actually edit the info.plist of each app but Retinizer allows you to set individual app settings rather than potentially damage your general app setting files. You can download it here.