Quickstyle 1.2 for Mac can be downloaded from our website for free. Quickstyle for Mac lies within Internet & Network Tools, more precisely Browser extensions.
From the developer:
Quickstyle is a Safari extension to quickly and conveniently restyle any Web page by adding your own CSS rules to it. Quickstyle features a handy "selector helper" that eases the task of finding the right CSS selector for the rule you want to create, and a built-in stylesheet editor so you can create and edit your rules right on the page. It's a lot easier and faster than using Safari's Web Inspector and editing an external User CSS file.
You may want to check out more Mac applications, such as Delete Flash Cookies, RSS Checker or Infoviewer, which might be similar to Quickstyle.