Search for "download .net core" and follow the instructions on Microsoft's download page for your platform. After the SDK has finished installing, open up the Terminal (or PowerShell on Windows) and use the
dotnet command line tool (also called a CLI) to make sure everything is working:
dotnet --version 2.0.0
You can get more information about your platform with the
dotnet --info .NET Command Line Tools (2.0.0) Product Information: Version: 2.0.0 Commit SHA-1 hash: cdcd1928c9 Runtime Environment: OS Name: Mac OS X OS Version: 10.12 (more details...)
If you see output like the above, you're ready to go!