OS X looks great, but sometimes you need to give your Mac a little personality, or maybe you just need some quick visual cues for your folders files. Sandro Cuccia shows you how to engage in a fun, but Apple-sanctioned method for customizing your Mac desktop icons.

Sandro Cuccia revisits Preview in OS X. He shows you how to have the latest Mountain Lion version of this versatile app easily scan and store one or more signatures for later insertion into any PDF document.

Got something to hide? Sure you do. Wanna know how to disguise that fact from anyone who may use your Mac? You can do so easily, so you'll never have to answer pesky questions about what you've hidden and why. And we here at TMO would never judge you for needing to hide files. They're Christmas present ideas, right?

Almost all modern OS X apps give you the ability to customize the toolbar to your liking and to accommodate your workflow habits. Sandro Cuccia shows you how to do this in the Preview app.

Have a couple printers you'd like to get more use out of, or maybe you don't want to have to ask which printer is available? No problem. Just make your own printer pool from your Mac.

Despite the promise long ago of the paperless office, we still need to print documents from our Macs at times. The usual launch an app to print a document routine works fine for that, but you can save a little time by printing your files directly from the Finder.

The Stickies app. Yet another gem that comes pre-installed on every Mac. Don't malign it if you haven't played with it for a while, because Sandro Cuccia shows you how Stickies can be used to enhance your workflow.

Apple includes multitouch gesture support for the built-in trackpads on its MacBook Pro and MacBook Air lineup, as well as the Magic Trackpad. With the long list of gestures OS X supports, it can be hard to figure them out. That is, until you know that Apple hid away a nice set of gesture tutorials in the System Preferences app.

Apple released Xcode 4.6.1 on Saturday, adding support for the recent OS X Mountain Lion 10.8.3 update. Xcode is Apple's app development environment with tools for creating and debugging code, and building app interfaces.

Control-clicking a document to see the Open With contextual menu is a handy way to choose exactly which app you use to open a PDF, JPG, or any other file. OS X has a problem, however, where duplicate apps can show up and make the list grow longer and longer. You can fix that issue when it crops up as long as you don't mind a quick trip to Terminal.