Prerequisites

Android:

1. If you have installed Appium from npm make sure you have latest version. e.g. npm -g install appium@beta or Build Appium from source.
2. Android SDK is installed and ANDROID_HOME is set as the environment variable.
3. JDK 1.8 is installed and JAVA_HOME is set as the environment variable.
4. Developer option is enabled on the attached device and must be authorized.

IOS (Real device):

1. Mac machine with XCode and command line tools installed. XCode version >= 6.0, 7.1.1 recommended.

2. libimobiledevice and ideviceinstaller must be installed.

   e.g. brew install libimobiledevice libplist libtasn1 usbmuxd openssl ideviceinstaller

3. Developer option must be enabled in attached iOS device (Settings>Developer>Enable UI Automation)

4. You must have a debug build of the application you wish to test.

5. If you want to trigger tests on Multiple Simulators in parallel make sure you have Xcode9-beta and latest appium version 1.6.6.beta.

6. Install ios-webkit-debug-proxy, if running web test on real devices. e.g. brew install ios-webkit-debug-proxy