Update iTunes: Before you get all excited and start updating your iPhone, iPod touch or iPad, you need to update to the latest version of iTunes. iTunes 10.2 and iOS 4.3 are BFFs and iOS 4.3 won't play nice without it's BFF. Software can be that way sometimes. If you haven't updated already, just navigate to the iTunes>Check for Updates in the Menu Bar.
Back Up: We hate sounding like a broken record, but it's important to make sure all your Angry Bird levels are saved in case something goes horribly wrong during the update. Plug your iOS device into your Mac and when it shows up in iTunes, right click (Control+click for MacBook users) and select Back up from the dropdown.
