Real, dated releases and announcements - verified against official sources, not speculation.
On May 18, 2007, Leopard on Intel Macs became the first BSD-based OS to earn Open Brand UNIX 03 certification, making 'Mac OS X is Unix' a certified fact.
Dolphin's 2003 debut proved commercial GameCube software could run under emulation, before open sourcing and expanding into Wii support.
Released August 24, 1995, Windows 95 brought the Start menu and taskbar to the mainstream, backed by one of the largest software marketing campaigns ever mounted.
Released July 27, 1993, Windows NT 3.1 was the first shipping version of the from-scratch, Dave Cutler-led OS underlying every Windows release since.
Announced June 24, 2021 by Panos Panay and released October 5, 2021, Windows 11 brought a redesigned interface and stricter hardware requirements.
First revealed via Windows 10 Insider Preview Build 14316 on April 6, 2016, WSL let Windows run real Linux binaries for the first time.