我认为错误消息还有很多，可能与CMake有关，要么安装不正确，要么与 pip3 install dlib不兼容.

I think there's more to the error message and it's probably related to CMake, either it's not installed properly or it's not compatible with the pip3 install dlib.

我建议使用 Homebrew 来安装Python3(包括pip3)和CMake.Homebrew管理可能依赖于系统相关工具，路径等的程序包，工具，库的安装.它还使您不必使用 sudo 在系统上安装程序.

I suggest using Homebrew to install Python3 (which includes pip3) and CMake. Homebrew manages the installation of packages, tools, libraries that might depend on system-related tools, paths, etc. It also prevents you from having to use sudo to install stuff on your system.

1. 安装自制软件

1. Install Homebrew

• 请参见"安装自制软件"； https://brew.sh/
• 基本上:

• See the "Install Homebrew" section of https://brew.sh/
• Basically:

$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

使用Homebrew安装Python3(和pip3)

Install Python3 (and pip3) using Homebrew

• 请参见 https://docs.brew.sh/Homebrew-and-Python
• 有关最新Python3的信息，请参见Homebrew的公式( python3.7 ， python3.8 ，

• See https://docs.brew.sh/Homebrew-and-Python
• See Homebrew's formula for the latest Python3 (python3.7, python3.8, python3.9)
• Basically do one of the following:

$ brew install python@3.7  # or python@3.8 or python@3.9
$ brew install python@3    # get whichever is the latest version

检查Python安装

$ python3 -V
$ python3 -m pip -V

$ brew install cmake

检查CMake安装

$ brew info cmake
$ cmake --version

$ python3 -m pip install dlib

如果您不想使用Homebrew(由于某种原因)，可以尝试从以下位置使用安装程序(dmg或tar.gz)直接安装Mac版CMake: 查看全文