10 Things You Must Do With Your New Macmatt buchanan12/25/09 9:40amFiled to: AppleMacSnow leopardTopFeature1751EditPromoteShare to KinjaToggle Conversation toolsGo to permalinkYou got a new Mac for Christmas? Awesome. But don't let Justin Long's smarmy face fool you, it doesn't just give you a warm hug and set itself up. Here are 10 things you need to do pronto:1. Check Out Snow Leopard's Interface Tweaks: They're not life-altering, but Apple's spiffed up the OS X interface in a couple of ways in Snow Leopard. Notably, there's Dock Expose (which works like Windows 7's Aero Peek) to show you all the windows of open app by clicking and holding on its icon in the dock. Also, giant, scalable thumbnail previews.