Usr directory structure in Mac

Below is list of directories and respective details as generally found in /usr/ directory of Mac.

Feel free to comment below if you find new directories (name and details)

/usr/:

  • /usr/bin/
  • /usr/lib/
    • /usr/lib/dtrace/
    • /usr/lib/groff/
    • /usr/lib/log/
    • /usr/lib/pam/
    • /usr/lib/php/
    • /usr/lib/pkgconfig/
    • /usr/lib/rpcsvc/
    • /usr/lib/sasl2/
    • /usr/lib/system/
    • /usr/lib/xpc/
    • /usr/lib/zsh/
  • /usr/libexec/
    • /usr/libexec/AppSandbox/
    • /usr/libexec/ApplicationFirewall/
    • /usr/libexec/AssetCache/
    • /usr/libexec/AssetCacheAgent/
    • /usr/libexec/DeveloperTools/
    • /usr/libexec/MiniTerm.app/
    • /usr/libexec/SmartCardServices/
    • /usr/libexec/apache2/
    • /usr/libexec/cups/
    • /usr/libexec/dtrace/
    • /usr/libexec/emacs/
    • /usr/libexec/fax/
    • /usr/libexec/feedback/
    • /usr/libexec/firmwarecheckers/
    • /usr/libexec/postfix/
    • /usr/libexec/wfs/
  • /usr/local/
    • /usr/local/Cellar/
    • /usr/local/DatacardService/
    • /usr/local/Homebrew/
    • /usr/local/MacGPG2/
    • /usr/local/airtel/
    • /usr/local/bin/
    • /usr/local/etc/
    • /usr/local/foreman/
    • /usr/local/heroku/
    • /usr/local/hw_mobile_userdata/
    • /usr/local/hw_mp_userdata/
    • /usr/local/include/
    • /usr/local/lib/
    • /usr/local/libexec/
    • /usr/local/microsoft/
    • /usr/local/opt/
    • /usr/local/pysqlite2-doc/
    • /usr/local/remotedesktop/
    • /usr/local/sbin/
    • /usr/local/share/
    • /usr/local/texlive/
    • /usr/local/var/
  • /usr/sbin/
    • /usr/sbin/authserver/
  • /usr/share/
    • /usr/share/CSI/
    • /usr/share/CoreDuetDaemonConfig.bundle/
    • /usr/share/calendar/
    • /usr/share/com.apple.languageassetd/
    • /usr/share/cracklib/
    • /usr/share/cups/
    • /usr/share/dict/
    • /usr/share/doc/
    • /usr/share/emacs/
    • /usr/share/examples/
    • /usr/share/file/
    • /usr/share/firmware/
    • /usr/share/germantok/
    • /usr/share/groff/
    • /usr/share/hiutil/
    • /usr/share/httpd/
    • /usr/share/icu/
    • /usr/share/info/
    • /usr/share/java/
    • /usr/share/kdrl.bundle/
    • /usr/share/kpep/
    • /usr/share/langid/
    • /usr/share/locale/
    • /usr/share/man/
    • /usr/share/mecabra/
    • /usr/share/misc/
    • /usr/share/php/
    • /usr/share/pmenergy/
    • /usr/share/sandbox/
    • /usr/share/screen/
    • /usr/share/skel/
    • /usr/share/snmp/
    • /usr/share/tabset/
    • /usr/share/terminfo/
    • /usr/share/texinfo/
    • /usr/share/thermald.bundle/
    • /usr/share/tokenizer/
    • /usr/share/ucupdate/
    • /usr/share/uucp/
    • /usr/share/vim/
    • /usr/share/zoneinfo.default/
    • /usr/share/zsh/
  • /usr/standalone/
    • /usr/standalone/firmware/
    • /usr/standalone/i386/
  • /usr/X11 -> /opt/X11/