Lifehacker - With the release of any new operating system comes a list of annoyances for veteran users. OS X Mountain Lion is no different, and while a number of its new features are great, a few annoyances have popped up that are pretty easy to fix. Here's how to do it.
De-iOS-ify the Interface
For an additional set of options you can also check out the free software Lion Tweaks 2. Lion Tweaks was initially released to get rid of some of OS X Lion's biggest annoyances, but has been updated with support for Mountain Lion. With Lion Tweaks you can quickly disable the resume feature for apps, get rid of the Calendar's leather look, show hidden files, and more.