如何安装Conda 3.7环境？

Question

只需在Mac上安装Anaconda并尝试使用它创建虚拟环境：
conda create -n py37 python=3.7 anaconda

错误：

UnsatisfiableError: The following specifications were found to be in conflict:
  - anaconda -> alabaster==0.7.10=py27h9dd7d6e_0 -> python[version='>=2.7,<2.8.0a0']
  - anaconda -> distribute==0.6.45=py26_0
  - anaconda -> libedit==3.1=hb4e282d_0
  - anaconda -> wheel==0.29.0=py27h84bd1c0_1
  - anaconda -> xz==5.2.3=ha24016e_1
  - python=3.7
Use "conda info <package>" to see the dependencies for each package.

任何人都知道如何解决此问题？