But it turns out that on Macs and if you have the right software on PCs, you can kind of get a teaser of what this environment tends to look like and be forewarned, what you're about to see is intentionally very underwhelming.

事实上，它是运行在苹果机上的,如果你在电脑上有正确的软件，可以去看看这个环境大致是怎么样的,提前说下，这个程序不会让你印象深刻,我是故意这样做的。

哈佛公开课 - 计算机科学课程节选

It comes with all Macs by default.

默认情况下所有的Mac电脑都装有该程序。

哈佛公开课 - 计算机科学课程节选