The changes listed for TT 5 include font settings for Safari 7, which is also OS X 10.9 only. The compatibility information above for TinkerTool 5 is incorrect. Tinker Tool is free, so my best recommendation is to just download it and try it for yourself. I also like the fact that Tinker Tool is its own application that I can get straight from the developer, without submitting to The Tyranny Of The App Store™, which takes version control and configurability away from the user.an intrusive abomination that stomps the Mac's traditional freedom of user choice into the dirt. I suspect most users don't need that feature, but when you do need it, it's mighty handy. It's handy to be able to toggle visibility on hidden files. One of the features I use most is 'Show hidden and system files' under Finder options in the Finder tab.
I'm not afraid of using CLI, but I'd much rather use the graphical user interface (GUI), which is really what the Mac was supposed to be all about. Tinker Tool does just what it says it enables the user to access and tweak various under-the-hood features of OS X, many of which you'd have to otherwise control using the command line interface (CLI) in Terminal.app.
