CentOS
Project history includes downstream CentOS Linux and the current CentOS Stream model.
Archives: Technology Atlas
Mac OS X 10.1-10.6
Early Mac OS X generations established the Unix-based modern Mac platform.
OS X 10.7-10.11
Lion through El Capitan expanded iCloud integration, security and modern Mac features.
macOS 10.12-10.15
Sierra through Catalina completed the move toward 64-bit-only applications.
macOS 11-15
Big Sur through Sequoia span Apple's transition from Intel to M-series processors.
macOS 26
A current-era macOS generation using Apple's year-based naming approach.
Future macOS releases
The source outline mentions macOS 27; details should remain a placeholder until Apple publishes official information.
Ubuntu
Popular Debian-derived distribution with regular and long-term-support releases.
Debian
Community distribution known for stability and broad architecture support.
Fedora
Fast-moving community distribution closely connected to Red Hat technologies.