Mac LCD monitors have a LED back light that's too blue and too narrow a gamut to do color grading. Yes, it's true that some of the early CRT machines were capable of this.
1. Every Mac since the early 90s has had support for color management
2. Most people doing serious color work have to buy a more expensive, professional-quality display – as has long been the case on every platform. This was a staple of reviews for printing, photography, scientific/medical imaging, etc. publications, along with comparing color calibration devices, and a big reason why CRTs persisted longer those fields than the general market.
Heck, a decent HP DreamColor / EIZO / NEC display costs almost as much as the top of the line 15" MacBook Pro.