问题
An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.
'https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r/osx-64
解决：貌似是Anaconda 的国内镜像都停用了，清华源和中科大源都用不上了，把这些都删了换成default，虽然慢一点，但是反而成功了
