BabelMap is not available for Mac but there are a few alternatives that runs on macOS with similar functionality. The best Mac alternative is PopChar. It's not free, so if you're looking for a free alternative, you could try Gucharmap. If that doesn't suit you, our users have ranked more than 25 alternatives to BabelMap and three of them are available for Mac so hopefully you can find a suitable replacement.
The character map that works! PopChar is an application that lets you insert special characters, umlauts and foreign letters into any document. With this character map, there is no need to search for or remember complex keystrokes.