Mac users interested in Wolfram cdf player 11.1.1 generally download:
CDF is a file format created by the Wolfram company. This type of file looks like a text document but works like an application. The format is mostly used for generating financial reports, slideshows, Web objects, and many others.
Wolfram CDF Player is exactly what its name suggests: a program that enables you to preview projects with the aforementioned file extension.