[icebraining]

If you're willing to restrict yourself to a couple of models like you have to with the Mac, then you can get a laptop that comes with Linux, like those from System76[1].

The only reason you have warning is because people want to use Linux on machines not supported by the manufacturer, but guess what: the same thing would happen with OS X.

[1]: https://www.system76.com/

[rbanffy]

I just got myself a Dell v131. Very happy with it. Small, slim and fast enough, with easy access to expansion. Not a Macbook, of course, and not an ultrabook, but half the price.