npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/webpack/node_modules/[email protected]@schema-utils/node_modules/ajv

npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/webpack/node_modules/[email protected]@schema-utils/node_modules/ajv-keywords

npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/webpack/node_modules/terser-webpack-plugin

npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/webpack/node_modules/watchpack

npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/webpack/node_modules/is-descriptor/node_modules

npm ERR! path /usr/local/lib/node_modules/webpack/node_modules/assert

npm ERR! code ENOENT

npm ERR! errno -2

npm ERR! syscall access

npm ERR! enoent ENOENT: no such file or directory, access ‘/usr/local/lib/node_modules/webpack/node_modules/assert‘

npm ERR! enoent This is related to npm not being able to find a file.

npm ERR! enoent

npm ERR! A complete log of this run can be found in:

npm ERR! /Users/zhouqiang/.npm/_logs/2018-12-11T11_57_35_887Z-debug.log

出現這種情況我建議你還是重新安裝node吧

可以通過命令查看一下npm配置

 npm list  -g    

Mac安裝vue產生錯誤