So I just realized this is a new MacBook Pro that I didn't actually download the compiler onto it apparently.
所以,我才意识到这是一台新电脑,显然我并没有把编译器安装到上面。
哈佛公开课 - 计算机科学课程节选
You can just go to Apple's website and download the appropriate link.
你可以登录Apple网站,下载相应链接。
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