Your MacBook Pro comes with 90 days of complimentary technical support and a one-year limited warranty. Purchase AppleCare+ for Mac to extend your coverage to three years from your AppleCare+ purchase date and add up to two incidents of accidental damage coverage, each subject to a service fee of $99 for screen damage or external enclosure damage, or $299 for other repairable damage, plus applicable tax. Learn more
NOW, though the product title DOES say that it comes preinstalled with EL CAPTAIN (or whatever), mine already came with the SIERRA update. It had Sierra Version 10.12.3 and in the app store, you can update it (FOR FREE) with the May 2017 recent Sierra 10.12.5 update! IF yours comes in with EL CAPTAIN, you can update it FOR FREE to the 2017 Sierra update - do not worry! Lol.
We don't know why the support.apple.com site glitched out on multiple occasions, but we were happy to see the issue disappear by our third call. If Apple wants an even better score next year, we'd suggest its agents find footing on Facebook, and make sure its employees know all the ins and outs of its latest features so that callers aren't put on hold while techs investigate.
Some counterfeit and third party power adapters and batteries may not be designed properly and could result in safety issues. To ensure you receive a genuine Apple battery during a battery replacement, we recommend visiting an Apple Store or Apple Authorized Service Provider. If you need a replacement adapter to charge your Apple device, we recommend getting an Apple power adapter.