There are a number of prerequisites to get started. You should have a Mac or PC with enough resources to install and run Unity. Details of the current system requirements for Unity can be found on their website (https://unity3d.com/unity/system-requirements), including the supported operating system version, the graphics card or built-in GPU, sufficient disk space, and necessary RAM memory.

For AR development, it is also recommended that you have a webcam attached to your PC for testing your projects within the Unity editor, even if the PC is not the target platform for your app, and a color printer for printing hard copies of target images.

There may be additional minimum requirements for your development system dictated by the target device. For HoloLens builds, Windows 10 is required. For iOS builds (iPhone and iPad), a Mac is required.