If you already have Unity installed on your computer, you can skip this section. Otherwise, you can follow the steps in this section to download and install Unity on your computer:
Go to the Unity home page: http://www.unity3d.com.
You see a Download link at the top-right section of the web page. Click that link to go to Unity's download page, as shown in the following screenshot:
On the download page, you'll see a Download Unity button that includes the current version of the engine. For example, the button might say Download Unity 5.1. The web page will know what operating system your computer has and will download the correct version. Click on the Download button. The installation file is quite large, well over 1GB, and could take several minutes to download, especially if you have a slow Internet connection.
Once the download completes, simply double-click on the
installationfile and let the installer do the work. Accept any defaults if prompted. Unity is an industrial strength game engine, so do not be alarmed if the installation process takes a while.Now you are ready to launch Unity for the first time. Double-click on the Unity icon.
