How Do I Know If My Mac Has AppleCare?

Point your browser to the AppleCare Agreement Support website (http://www.apple.com/support/applecare/welcome/).
Click 'Check Coverage' underneath 'Check Your Service and Support Coverage.'
Enter the serial number for your Apple product. You can usually find this number somewhere on the surface of your device or in the 'About this Mac' window, which can be opened by clicking the apple in the top left-hand corner of your screen. This information may also be on the product receipt or packaging.
Hit the 'Enter' button to find out if you currently have coverage. If so, you will see all green checkmarks on the next screen and a message that states, 'Your product is eligible for hardware repairs and service under the AppleCare protection plan.
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How to See if a MacBook Has Been Registered (5 Steps)

Click the Apple logo in the upper left corner of your MacBook's screen and select 'About This Mac.' Click the 'More Info' button to open the System Information window.
Highlight the Serial Number of your MacBook displayed in this window, and press 'Command-C' on your keyboard to copy it.
Open a Web browser and navigate to the Apple Service and Support Coverage page (see link in Resources).
Paste your MacBook's serial number into the 'Hardware Serial Number' field, then choose your country from the drop-down list below. Click 'Continue' to submit this information.
Click the 'See your service and support coverage' link underneath the summary of your MacBook. If your MacBook is registered, you will see a green tick icon underneath the MacBook summary, and the word 'Registered.' If it isn't, you'll see an orange exclamation point and a prompt to register it.
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