Mac 上的权限被拒绝

Question

我想将 Mac 上的 Python 默认版本从 Python2 更改为 Python3。但是，当我尝试这样做时，它说权限被拒绝。这是我尝试过的：

ls -l /usr/local/bin/python*

输出是：

lrwxr-xr-x  1 root  wheel  69 Jun 21 10:41 /usr/local/bin/python3 -> ../../../Library/Frameworks/Python.framework/Versions/3.9/bin/python3
lrwxr-xr-x  1 root  wheel  76 Jun 21 10:41 /usr/local/bin/python3-config -> ../../../Library/Frameworks/Python.framework/Versions/3.9/bin/python3-config
lrwxr-xr-x  1 root  wheel  71 Jun 21 10:41 /usr/local/bin/python3.9 -> ../../../Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9
lrwxr-xr-x  1 root  wheel  78 Jun 21 10:41 /usr/local/bin/python3.9-config -> ../../../Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9-config

然后，我尝试：

ln -s -f /usr/local/bin/python3.9 /usr/local/bin/python

然而，出现的是这样的情况：

ln: /usr/local/bin/python: Permission denied

我应该如何解决这个问题？

Answer 1

要更改默认版本，您只需在终端中输入以下命令即可：

alias python=python3