This short 12 step slideshow from Business Insider shows you how to get the best service from the Genius Bar at the Apple Store.
The Genius Bar is the in-store technical service desk at the Apple Store. If your Mac or Apple device is still under warranty, this is a good first stop for dealing with hardware issues.
For all new Macs, you can buy Apple Care (the extended warranty) within the first year. I wouldn’t recommend buying a new Mac unless you buy Apple Care.
For all software or out of warranty issues, I am your go to guy!