XNU kernel

wikipedia:XNU kernel (1996)

XNU used in macOS, and has always been open source for about 20 years.

otool

See also

• macOS: macOS versions, iTerm2, Homebrew, FileVault, System Integrity Protection, dscacheutil, networksetup, XNU kernel, APFS, diskutil, mdfind, Keychain Access, Growl, Activity Monitor, sidecar, macOS FHS, Apple Notification Center, sw_vers, Spotlight, pbcopy, MacOS application firewall, Applesimutils, Automatic login, security (command), codesign, spctl, Alfred, Xcode, system_profiler, log show, MacOS Preview, Rectangle app, Finder, macOS: Shortcuts, SEP, osascript, macOS profile, UTM, softwareupdate, systemsetup, pmset , macOS tips, macOS Dock, Automator, SIP, System Preferences, installer, cryptex
• Linux Kernel: namespaces, Cgroups, OOM, proc, Linux Kernel changelog, sysctl, userfaultfd, Grub, ENOSPC, ENOMEM, DKMS, syscall, Transparent huge pages, smatch, sysfs, vm.swappiness, CFS, Runlevel, Jens Axboe, Consistent Network Device Naming, Initial ramdisk (initrd), modprobe, MTD, Linux Kernel vulnerabilities, /sys/kernel/
• Kernel: Linux Kernel, macOS XNU, FreeBSD, OpenBSD, NetBSD