Microsoft Small Basic is not available for Mac but there are plenty of alternatives that runs on macOS with similar functionality. The best Mac alternative is Microsoft Visual Studio. It's not free, so if you're looking for a free alternative, you could try Eclipse or Apache NetBeans. If that doesn't suit you, our users have ranked more than 50 alternatives to Microsoft Small Basic and many of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Microsoft Small Basic are Qt Creator (Free, Open Source), WebStorm (Paid), MonoDevelop (Free, Open Source) and Lazarus (Free, Open Source).
Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft. It is used to develop computer programs for Microsoft Windows, as well as web sites, web applications and web services.
MonoDevelop enables developers to write desktop and web applications on Linux, Windows and Mac OS X. It also makes it easy to port .NET applications created with Visual Studio to Linux and Mac OS X maintaining a single code base for all platforms.
Lazarus is a cross-platform IDE for the Free Pascal compiler. It tries to offer a Delphi-like programming experience through its own 'Lazarus Component Library' and supporting many platforms like Windows, OSX, Linux, BSD, Android, iOS and more.
Aptana Studio is a complete web development environment that combines powerful authoring tools with a collection of online hosting and collaboration services that help you and your team do more. Includes support for PHP, CSS, FTP, and more...