How to sideload apps on an Amazon Fire TV/Stick with a Mac.

Enable ADB Debugging mode

1. Settings > System > Developer Options
2. Enable "ADB Debugging"

Find your IP Address

1. Settings > System > About
2. Network (Write down for later)

Set up ADB on your Mac

From your Mac Terminal:

    wget http://www.mediafire.com/download/yum9gn1wdx855x0/platform-tools-osx.zip
    unzip platform-tools-osx.zip`
    cd platform-tools

Start the ADB server and connect to your Fire TV:

    ./adb connect IPADDRESS

Sideload Apps

Download an app's .APK file and type in:

    ./adb install filename.apk

The application will now be located in Settings > Applications.