Python3 报错 dyld cache '/System/Library/dyld/dyld_shared_cache_x86_64h' not loaded: syscall to map cache into shared region failed

在执行 Python3 命令的时候报如下错误：

$ python3
dyld[44774]: dyld cache '/System/Library/dyld/dyld_shared_cache_x86_64h' not loaded: syscall to map cache into shared region failed
dyld[44774]: Library not loaded: /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
  Referenced from: /Library/Frameworks/Python.framework/Versions/3.6/Resources/Python.app/Contents/MacOS/Python
  Reason: tried: '/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation' (no such file), '/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation' (no such file)
[1]    44774 abort      python3

估计是 Python 版本有问题，自 macOS Monterey 12.3 后，Python 2 已经从系统移除，安装命令行开发者工具后会自动安装 Python 3，那就可以换成 macOS 的 Python3 试试。

1. 查询系统是否自带 Python 3，一般放在 /usr/bin 下：

   $ l /usr/bin/ | grep -i python 
   lrwxr-xr-x     1 root   wheel    74B Dec  8  2021 2to3- -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/2to3-2.7
   lrwxr-xr-x     1 root   wheel    74B Dec  8  2021 2to3-2.7 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/2to3-2.7
   lrwxr-xr-x     1 root   wheel    73B Dec  8  2021 idle -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/idle2.7
   lrwxr-xr-x     1 root   wheel    73B Dec  8  2021 idle2.7 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/idle2.7
   lrwxr-xr-x     1 root   wheel    74B Dec  8  2021 pydoc -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/pydoc2.7
   lrwxr-xr-x     1 root   wheel    74B Dec  8  2021 pydoc2.7 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/pydoc2.7
   lrwxr-xr-x     1 root   wheel    75B Dec  8  2021 python -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7
   lrwxr-xr-x     1 root   wheel    82B Dec  8  2021 python-config -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config
   lrwxr-xr-x     1 root   wheel    75B Dec  8  2021 python2 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7
   lrwxr-xr-x     1 root   wheel    75B Dec  8  2021 python2.7 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7
   lrwxr-xr-x     1 root   wheel    82B Dec  8  2021 python2.7-config -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config
   -rwxr-xr-x     1 root   wheel   163K Dec  8  2021 python3
   lrwxr-xr-x     1 root   wheel    76B Dec  8  2021 pythonw -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/pythonw2.7
   lrwxr-xr-x     1 root   wheel    76B Dec  8  2021 pythonw2.7 -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/pythonw2.7
   lrwxr-xr-x     1 root   wheel    77B Dec  8  2021 smtpd2.7.py -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/smtpd2.7.py

2. 查看环境变量 PATH 下的 Python 3：

   $ which python3
   /Library/Frameworks/Python.framework/Versions/3.6/bin/python3
   
   # ganzhixiong @ MacBook in ~ [12:19:27] 
   $ echo $PATH | tr ':' '\n'
   /Users/ganzhixiong/development/flutter/bin/cache/dart-sdk/bin
   /Users/ganzhixiong/.dotnet/tools
   /Users/ganzhixiong/development/flutter/bin
   /Library/Frameworks/Python.framework/Versions/3.6/bin
   /usr/local/bin
   /usr/bin
   /bin
   /usr/sbin
   /sbin
   /usr/local/go/bin
   /usr/local/share/dotnet
   ~/.dotnet/tools
   /Library/Apple/usr/bin
   /Users/ganzhixiong/Library/Android/sdk/tools
   /Users/ganzhixiong/Library/Android/sdk/platform-tools
   /usr/local/mysql/bin
   /Users/ganzhixiong/Library/Android/sdk/build-tools/25.0.0/aapt
   /Users/ganzhixiong/.rvm/bin
   /Users/ganzhixiong/.rvm/bin
   
   # ganzhixiong @ MacBook in ~ [12:20:07] 
   $ type -a python3
   python3 is /Library/Frameworks/Python.framework/Versions/3.6/bin/python3
   python3 is /usr/local/bin/python3
   python3 is /usr/bin/python3

3. 删除环境变量 PATH 中 /usr/bin 之前路径中的 Python 3：

   $ code ~/.bash_profile             
   
   # ganzhixiong @ MacBook in ~ [12:23:39] 
   $ source ~/.bash_profile 
   
   # ganzhixiong @ MacBook in ~ [12:24:55] 
   $ type -a python3
   python3 is /usr/local/bin/python3
   python3 is /usr/bin/python3
   
   # ganzhixiong @ MacBook in ~ [12:26:27] C:134
   $ l /usr/local/bin/ | grep -i python3 
   lrwxr-xr-x    1 ganzhixiong  admin    61B Apr 21 11:00 python3 -> /Library/Frameworks/Python.framework/Versions/3.6/bin/python3
   lrwxr-xr-x    1 ganzhixiong  admin    72B Jun  4  2018 python3-32 -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3-32
   lrwxr-xr-x    1 ganzhixiong  admin    76B Jun  4  2018 python3-config -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3-config
   lrwxr-xr-x    1 ganzhixiong  admin    71B Jun  4  2018 python3.6 -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
   lrwxr-xr-x    1 ganzhixiong  admin    74B Jun  4  2018 python3.6-32 -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6-32
   lrwxr-xr-x    1 ganzhixiong  admin    78B Jun  4  2018 python3.6-config -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6-config
   lrwxr-xr-x    1 ganzhixiong  admin    72B Jun  4  2018 python3.6m -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6m
   lrwxr-xr-x    1 ganzhixiong  admin    79B Jun  4  2018 python3.6m-config -> ../../../Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6m-config
   
   # ganzhixiong @ MacBook in ~ [12:26:42] 
   $ rm /usr/local/bin/python3
   
   # ganzhixiong @ MacBook in ~ [12:27:08] 
   $ type -a python3
   python3 is /usr/bin/python3

4. 验证。

   $ python3
   Python 3.8.9 (default, Oct 26 2021, 07:25:54) 
   [Clang 13.0.0 (clang-1300.0.29.30)] on darwin
   Type "help", "copyright", "credits" or "license" for more information.
   >>>

参考

• 为什么 macOS 在 /usr/bin/ 下会有 python3? - 知乎