這個夏天。

使用 brew 安裝 python 時出現錯誤，

You can try again using `brew link gdbm`

再重新安裝顯示已安裝成功，

Warning: python 3.6.5 is already installed, it's just not linked
You can use `brew link python` to link this version.

執行$ brew link python出現錯誤，

Linking /usr/local/Cellar/python/3.6.5... Error: Permission denied @ dir_s_mkdir - /usr/local/Frameworks

解決方法：

$ sudo mkdir /usr/local/Frameworks
$ sudo chown $(whoami):admin /usr/local/Frameworks
$ brew link python
Linking /usr/local/Cellar/carthage/0.28.0... 4 symlinks created