If I follow this steps to create a new app:
Rubens-MacBook-Pro:~ rlopez$ npm install -g cordova ionic
Rubens-MacBook-Pro:~ rlopez$ ionic start myApp tabs
Rubens-
run the cordova command with --verbose option. Do not prefix the command with ionic cordova. This will tell you where the access problem is. For me it was a problem where gradlew was installed on my system without execution privileges. Once i add execution ability to gradlew, the eaccess error went away.