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Status: Archived

This repository has been archived and is no longer maintained.

Simian has served Google well for many years, so we’d love to see development continue with someone else as maintainer. If you’re interested in taking Simian over, please fork the project.


Note 1: OS X 10.6, 10.7, 10.8 support dropped (22 April 2016)

Note 2: Simian now supports Munki2 categories!

Simian is an enterprise-class Mac OS X software deployment solution hosted on Google App Engine (why App Engine?). It scales to any enterprise fleet size automatically, and offers a future proof client extended from the active Munki open-source project.

Because the Simian server is live code, not a static file server, it offers unique benefits over a typical Munki+Apache deployment:

  • Simian can generate software manifests dynamically, on the fly, based on client properties.
  • The administration overhead of static manifest management is removed.
  • Any possible customizations to client software offerings are possible by modifying the server.

In summary, Simian's feature set allows it to:

  • Deploy new or updated software by targeting a single Mac or tens of thousands.
  • Deploy updates whether the Mac is on an internal network/VPN or not.
  • Force unattended/background installation of some packages, while allowing others to be optional.
  • Forcefully deploy security patches and reboot Macs after a given date, with varying levels of warning notifications.
  • Tightly manage Apple Software Update catalogs and update release, or let updates auto-promote automatically.
  • Dynamically target clients based on user, hostname, os version, group (tag), and more.
  • Obtain reports on all of this and the fleet overall.

Much of this and more is due to the outstanding work of Greg Neagle and the Munki community. To read more about the other features Munki offers please visit the Munki on GitHub.

Getting Started

Please refer to the Wiki documentation for instructions on how to download, configure, build, and deploy Simian.

For screenshots and an overview of Simian features, please see the SimianAtAGlance wiki.


The work done under Simian has been licensed under Apache License 2.0. The license file can be found here. You can find out more about the license, at


If you have any issue or question which isn't covered in the Wiki documentation, we recommend you search and then post to the Google Group.

If your question is sensitive in nature, feel free to reach direct to the engineering team at

Finally, if you'd like to stay aware of future Simian news, please subscribe to Google Group


Simian is an enterprise-class Mac OS X software deployment solution. Google App Engine hosted server, with a client powered by the Munki open-source project.







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