手痒在mac上开始尝试重新玩@vue/cli，

sudo npm install -g @vue/cli

结果遇到一堆报错：

gyp ERR! configure error 
gyp ERR! stack Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/.node-gyp'
gyp ERR! System Darwin 18.7.0
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--module=/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node" "--module_name=fse" "--module_path=/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64" "--napi_version=4" "--node_abi_napi=napi" "--napi_build_version=0" "--node_napi_label=node-v64"
gyp ERR! cwd /usr/local/lib/node_modules/@vue/cli/node_modules/fsevents
gyp ERR! node -v v10.16.3
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok 
node-pre-gyp ERR! build error 
node-pre-gyp ERR! stack Error: Failed to execute '/usr/local/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64/fse.node --module_name=fse --module_path=/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/lib/binding/Release/node-v64-darwin-x64 --napi_version=4 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v64' (1)
node-pre-gyp ERR! stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack     at ChildProcess.emit (events.js:198:13)
node-pre-gyp ERR! stack     at maybeClose (internal/child_process.js:982:16)
node-pre-gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5)
node-pre-gyp ERR! System Darwin 18.7.0
node-pre-gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/@vue/cli/node_modules/fsevents/node_modules/node-pre-gyp/bin/node-pre-gyp" "install" "--fallback-to-build"
node-pre-gyp ERR! cwd /usr/local/lib/node_modules/@vue/cli/node_modules/fsevents
node-pre-gyp ERR! node -v v10.16.3
node-pre-gyp ERR! node-pre-gyp -v v0.12.0
node-pre-gyp ERR! not ok 

查了很多资料，最后找到有效的解决命令：

sudo npm install -g @vue/cli --allow-root

查看版本，是ok的：

vue --version

3.11.0