There are many reasons you might want to browse anonymously which can be accomplished by using [Tor](https://www.torproject.org). The setup instructions on Tor's website are quite scattered and outdated so here are some steps to setup Tor on macOS with a simple automated script at the end.
The most simple way to surf anonymously with Tor is to just grab [Tor Browser](https://www.torproject.org/projects/torbrowser.html.en). It's a modified version of [Firefox Extended Support Release (ESR)](https://www.mozilla.org/en-US/firefox/organizations/) with Tor and some extensions (Torbutton, TorLauncher, NoScript, and HTTPS-Everywhere) built right in. Upon start, Tor Browser automatically starts the required Tor background processes and routes traffic through the Tor network. That's the way to go if you want the highest level of protection without much further configuration.
But it's based on an old version of Firefox and there might be more you want to do anonymously on your machine than just browsing the web, like accessing resources via the Terminal or any other app. Or just use the browser you're used to.
For this you need to have Tor installed on your system and additionally set specific proxy values in your network preferences after you've started Tor.
<p>Be aware that the instructions and the script mentioned below will not make whatever you do on the web anonymous. Much depends on your browsing habits, what apps you're using, and none of the methods below will offer the same level of protection than <ahref="https://www.torproject.org/projects/torbrowser.html.en">Tor Browser</a> out of the box. You have been warned.</p>
Contrary to the weirdly outdated [install instructions on Tor's website](https://www.torproject.org/docs/tor-doc-osx.html.en) (hey, remember Macports?), installing Tor on macOS is super simple with [Homebrew](http://brew.sh).
In order for all your system traffic being routed through Tor you need to adjust your system's network proxy settings which you can either do visually in the System Preferences or programmatically via macOS's builtin `networksetup`.
After hitting *OK*&*Apply* at the initial network screen, you can easily switch to this newly created location from your menu bar under * > Location* whenever you start up Tor.
Switching to the Tor location routes all network traffic on your system through Tor. Note that you have to repeat those steps for every other network interface if you use, say, Wi-Fi and Ethernet interchangeably.
## All in one go: start Tor & set network proxy settings automatically
When you're already in the Terminal to start up Tor, additionally setting the network settings involves a lot of fiddling around. Ain't nobody got time for that.
Thankfully macOS provides a way to programmatically set those proxy values via the `networksetup` utility. I've found a [nice script](http://leonid.shevtsov.me/en/an-easy-way-to-use-tor-on-os-x) for this but running it opened multiple admin password prompts. So I extended it a bit to make it more user friendly.
Save this script under something like `tor.sh` in one of your sourced `bin` folders, make it executable with `chmod + x` and use it as a replacement for the general `tor` command. So you can just run
Some apps are just not good Mac citizens and use their own network settings, ignoring macOS system network proxy settings. E.g. older versions of Google Chrome were using their own custom network settings and therefore were not routing their web traffic through the proxy configured in System Preferences.
But the most recent Chrome version automatically picks up macOS's native proxy settings, as does the most recent version of Firefox.
Always [check](https://check.torproject.org) your Tor connection with whatever app you're using and if needed set the proxy preferences manually in the respective app with:
