3 ms·

Mach (used by GNU Hurd) deserves a mention.

• Iwan-Zotow 4y ago
  only a mention
  • notorandit 4y ago
    And a long fart
• cayleyh 4y ago
  And the original basis for the NeXTStep -> OpenStep -> OS X -> iOS / MacOS line. Source for XNU, the current incarnation of Apple's microkernel is available as part of the Darwin stuff: https://github.com/apple/darwin-xnu https://github.com/apple/darwin-xnu
• snvzz 4y ago
  It's a good example of how not to do microkernels. i.e. everything that was wrong with them, before Liedtke proposed L3 and L4.