Here are a few tips to help you identify your MacBook. You can locate the serial number, model identifier, and part number on the device’s surface. Besides, on almost all versions of this computer you will find this information in the About this Mac window. If you have the original box of your MacBook, you can find the information on the packaging. If you purchased the device in Apple store or at an authorized third-party retailer, the serial number will appear on the invoice or receipt.