After removing the older version of nvm, i installed the latest version of node by using homebrew. However, i got some problem starting my project using pm2:
pm2-dev server.js
It loaded the path including nvm. Here is the log:
Error: Cannot find module '/Users/wyb/.nvm/versions/io.js/v3.0.0/lib/node_modules/pm2/lib/ProcessContainerFork.js'