node.js - Errors Installing Ionic Framework on Mac -


when trying install ionic framework on mac via node.js using command $ npm install -g cordova ionic getting following errors

npm err! darwin 14.3.0 npm err! argv "node" "/usr/local/bin/npm" "install" "-g" "cordova" "ionic" npm err! node v0.12.5 npm err! npm  v2.12.0  npm err! attempt unlock /usr/local/lib/node_modules/cordova, hasn't been locked npm err!  npm err! if need help, may report error at: npm err!     <https://github.com/npm/npm/issues> npm err! darwin 14.3.0 npm err! argv "node" "/usr/local/bin/npm" "install" "-g" "cordova" "ionic" npm err! node v0.12.5 npm err! npm  v2.12.0  npm err! attempt unlock /usr/local/lib/node_modules/ionic, hasn't been locked npm err!  npm err! if need help, may report error at: npm err!     <https://github.com/npm/npm/issues>  npm err! please include following file support request: npm err!     /users/kernelliott/npm-debug.log 

any idea why getting these errors?

use sudo installing in system directory (with -g, global flag):

sudo npm install -g cordova ionic 

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