Depending on the product, you can find your serial number: On the surface of your product. In iTunes, if your product syncs with iTunes. On a Mac, by choosing About This Mac from the Apple menu.; On an iPhone, iPad, iPod touch, iPod, or Apple Watch, in Settings General About. You might want the model name or serial number of your Mac when checking warranty coverage, searching for specifications or other information about your model, creating a home inventory, and more. Identifying your Mac model is also important when selling or giving away your Mac or learning whether it's compatible with the latest operating system or other software or hardware.