PackagesNotFoundError: The following packages are not available from current channels:

问题提示：
lxjdeMacBook-Pro-2:~ lxj$ conda create -n mytorch python=3.7
Collecting package metadata (repodata.json): done
Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

• python=3.7

Current channels:

• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/osx-64
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch

To search for alternate channels that may provide the conda package you’re
looking for, navigate to

https://anaconda.org

and use the search bar at the top of the page.

lxjdeMacBook-Pro-2:~ lxj$
解决方法：
当前链接渠道中不存在python3.7
可以选择python3.7重新安装