iTunes

You must change your iTunes password (otherwise known as an Apple ID) on a computer. Apple does not currently provide a way to change iTunes or App Store login passwords directly on iOS devices. To change your password follow these steps:

1. Open a web browser and navigate to appleid.apple.com
2. Select Manage your account under "Already have an Apple ID?"
3. Enter your Apple ID and current password and click Sign In
4. From the left menu select Password and Security
5. Click the Change Password link under "Choose a new password."

If you would like to request a refund for a recently purchased application from the App Store, you can contact Apple using iTunes directly. Here are the steps to ask for a refund to your iTunes account:

1. Open iTunes and navigate to the top menu Store -> View My Account.
2. Click See All under the section titled Purchase History.
3. Click the grey arrow to the left of the Order Date.
4. Click the Report a Problem button.
5. A column titled Report a Problem will appear with a list of apps purchased that day. Click Report a Problem next to the app you would like refunded.

So you're suddenly finding that when you connect your iPhone to your Mac, iTunes seems completely unaware that you've done so. iPhoto or Lightroom might see your iPhone and try to import photos from it, and your iPhone knows it is connected (charging icon appears on your iPhone), but your computer seems none the wiser.

Well, there are a variety of circumstances under which this can happen and a variety of reasons why. Rather than go through all of them (which some of you might like us to), here's the most common reason and the most common fix.