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python環境構築について

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pythonの環境構築についてよくわからない点があります。
ターミナルでpythonと打ってもanacondaが表示されなくてanacondaを入れる必要があったので、
https://qiita.com/neet-AI/items/54f675dbcc1a0a513882
このページを参考にして一通りの順序に沿ってやってみたのですが
pyenvを入れようとしたところでこう表示されてどのように対処すればいいのか分からず困っています。
どなたか対処法をご存知の方がいらっしゃいましたらご教授ください。
Macは10.13.6です。

Downloading Anaconda3-4.2.0-MacOSX-x86_64.sh...
-> https://repo.continuum.io/archive/Anaconda3-4.2.0-MacOSX-x86_64.sh
Installing Anaconda3-4.2.0-MacOSX-x86_64...

BUILD FAILED (OS X 10.13.6 using python-build 20180424)

Inspect or clean up the working tree at /var/folders/0d/rxhsgkqx36d_y57r1fnys6yw0000gn/T/python-build.20181129092250.89526
Results logged to /var/folders/0d/rxhsgkqx36d_y57r1fnys6yw0000gn/T/python-build.20181129092250.89526.log

Last 10 log lines:
installing: anaconda-4.2.0-np111py35_0 ...
installing: ruamel_yaml-0.11.14-py35_0 ...
installing: conda-4.2.9-py35_0 ...
installing: conda-build-2.0.2-py35_0 ...

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