https://wccftech.com/apple-is-extending-applecare-coverage-for-macs-beyond-three-years/

For the first time, Apple is making AppleCare+ available for the Apple TV. However, the company has also announced another major change for Mac users. You can now extend your AppleCare+ coverage for the Max indefinitely in the United States. That's right, Apple now allows you to extend the coverage beyond the three-year mark. Let's dive in to see some more details on the scenario.

According to the updated Apple support document, you can now extend the AppleCare+ coverage beyond three years.  The initial coverage remains three years once you pay upfront for AppleCare+. However, users can now purchase additional coverage the renews annually until you decide to cancel it yourself. Take note that the new coverage should be purchased within 30 days of the end date of the initial coverage, according to the company.