In the App Store on your Mac, click Sign In at the bottom-left corner.
Do any of the following:
Create an Apple ID (if you don’t already have one): Click Create Apple ID, then follow the onscreen instructions.
View account settings: Click your name at the bottom-left corner, then click View Information.
Account information includes your Apple ID, billing information, and the nickname you use when you review apps. You can also view purchases that you’ve hidden.
