This can happen if you ran part of the install with sudo (i.e. npm) which you have to do on OS X. You need to do sudo chown -R username * to change some of the files ownership from root to yourself.
This can happen if you ran part of the install with sudo (i.e. npm) which you have to do on OS X. You need to do sudo chown -R username * to change some of the files ownership from root to yourself.