Neovim应该算是Vim的一个衍生版本或类似插件吧，从github两万多的star数可以看出其火爆程度。貌似提升性能和增加功能的同时也兼容了Vim。安装来体验一下。

Neovim安装教程地址在这。

Mac下直接：

brew install neovim

命令行启动命令：

nvim

查看帮助文档：

:help nvim

初始化Neovim，直接使用之前Vim的配置和插件目录：

To start the transition, create ~/.config/nvim/init.vim with these contents:                                                                                                                        
set runtimepath^=~/.vim runtimepath+=~/.vim/after                                               
let &packpath = &runtimepath                                                                    
source ~/.vimrc

这样便安装和配置完毕了。

检查Neovim的「健康状况」:

:checkhealth

配置Python2和Python3的路径，尤其是系统上有多个Python环境或版本时：

vimrc中添加Python路径：
let g:python_host_prog  = '/Users/test/anaconda2/bin/python'                                  
let g:python3_host_prog = '/usr/local/bin/python3'

具体查看:help provider-python文档

同时启用Python支持：

sudo pip install neovim
sudo pip3 install neovim

Neovim可以配合Ruby和Node使用，需要使用到的话可以安装支持:

Ruby:
sudo gem install neovim

Node:
npm install -g neovim

Mac原来上的Node版本是5.7.1，报错了，使用nvm换成最新的lts版本：

nvm install --lts
nvm alias default 8.9.4

走完以上步骤checkhealth的结果正常应该是类似下面的：

health#nvim#check
========================================================================
## Configuration
  - OK: no issues found

## Performance
  - OK: Build type: Release

## Remote Plugins
  - OK: Up to date

## terminal
  - INFO: key_backspace (kbs) terminfo entry: key_backspace=^H
  - INFO: key_dc (kdch1) terminfo entry: key_dc=\E[3~
  - INFO: $XTERM_VERSION=''
  - INFO: $VTE_VERSION=''
  - INFO: $COLORTERM=''
  - INFO: $SSH_TTY=''

health#provider#check
========================================================================
## Clipboard (optional)
  - OK: Clipboard tool found: pbcopy

## Python 2 provider (optional)
  - INFO: Using: g:python_host_prog = "/Users/test/anaconda2/bin/python"
  - INFO: Executable: /Users/test/anaconda2/bin/python
  - INFO: Python2 version: 2.7.9
  - INFO: python-neovim version: 0.2.0
  - OK: Latest python-neovim is installed: 0.2.0

## Python 3 provider (optional)
  - INFO: Using: g:python3_host_prog = "/usr/local/bin/python3"
  - INFO: Executable: /usr/local/bin/python3
  - INFO: Python3 version: 3.6.4
  - INFO: python3-neovim version: 0.2.0
  - OK: Latest python3-neovim is installed: 0.2.0

## Ruby provider (optional)
  - INFO: Ruby: ruby 2.3.3p222 (2016-11-21 revision 56859) [universal.x86_64-darwin17]
  - INFO: Host: /usr/local/bin/neovim-ruby-host
  - OK: Latest "neovim" gem is installed: 0.7.0

## Node provider (optional)
  - INFO: Node: v8.9.4
  - INFO: Host: /Users/test/.nvm/versions/node/v8.9.4/bin/neovim-node-host
  - OK: Latest "neovim" npm is installed: 3.5.2

Ruby provider的检查可能出现连不了网络。

更多Neovim配置，可以参考：