I was trying to download an App from the Mac OS X App Store. When I put in my password and clicked Sign In, instead of downloading and installing the application this message came up: There was an error in the App Store. Please try again later. (4) Luckily I have more than one Apple ID, so I just deleted my email address from the left text field and put in my other email address, put in my password or that one and clicked Sign In again. It worked fine. So for anyone who is better at computers than me, you could probably find the underlying problem for this. Because this tells me that the problem is with the account and not the app store, maybe wrong info somewhere or something.