In the previous chapter, we started with the process of setting up our system for AR development, installing the Unity 3D engine and one or more AR development kits. In this chapter, we will complete the setup process by installing and using additional tools in order to build an app for various target devices, be it Android or iOS mobile devices (phone or tablet), macOS, Windows 10 desktop, or Microsoft Mixed Reality.

In the first topic of this chapter, we will cover general procedures for building from Unity. After that, you can skip to the topic(s) you need, among the following:

• Building and running from Unity and targeting desktops
• Targeting Android
• Targeting iOS
• Targeting Microsoft MR Holographic

We apologize for how technical this can get, but it's a necessary evil. Think of it as an initiation rite. Everyone must go through it, at least once. Fortunately, once your machine is set up for target builds, you may not have to do it ever again. Well, that is, until you change machines or after you have a major upgrade.