Brew a pot of coffee and turn off your phone, it’s time to settle in for a long read. John Siracusa’s exhaustive, entertaining and technically rich review of Mac OS X 10.10 Yosemite is here. Siracusa’s yearly reviews of the Mac operating system have become an annual treat since he first began with Mac OS X 10.0. This year’s review spends a lot of time on Yosemite’s marquee feature:

In last year’s OS X release, Apple tore down the old. This year, finally, Apple is ready with the new. To signal the Mac’s newfound confidence, Apple has traded 10.9’s obscure surfing location for one of the best known and most beautiful national parks: Yosemite. The new OS’s headline feature is one that’s sure to make for a noteworthy chapter in the annals of OS X: an all-new user interface appearance.

Siracusa’s insight into the UI and technical design of Mac OS X is enriched by 30 years of Mac experience and a little OCD. Who else can lament on the move from pulsating default buttons, or wax nostalgic about Kaleidoscope schemes? His reviews have become so legendary, there are reviews of his reviews. Sadly, as listener’s of John’s Accidental Tech Podcast know, this may be the last year he writes his 25,000+ word review. Kick back and enjoy one last labor of love.