macos anaconda 为啥不能创建指定python版本的虚拟环境呢？

(tom)tomlong@zldeMacBook-ProPhiGnet%condacreate-nphigentpython=3.6

Channels:

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge

-defaults

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/fastai

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda

Platform:osx-arm64

Collectingpackagemetadata(repodata.json):done

Solvingenvironment:failed

PackagesNotFoundError:Thefollowingpackagesarenotavailablefromcurrentchannels:

-python=3.6*

Currentchannels:

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge

-defaults

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/fastai

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda

Tosearchforalternatechannelsthatmayprovidethecondapackageyoure

lookingfor,navigateto

https://anaconda.org

andusethesearchbaratthetopofthepage.

(tom)tomlong@ldeMacBook-ProPhiGnet%

请问这是为啥呢？