$ ./gf_darwin_amd64 install
I found some installable paths for you(from $PATH):
Id | Writable | Installed | Path
0 | true | true | /usr/local/bin
1 | true | false | /Users/john/Workspace/Go/GOPATH/bin
2 | true | false | /Users/john/.gvm/bin
4 | true | false | /Users/john/.ft
please choose one installation destination [default 0]:
gf binary is successfully installed to: /usr/local/bin