Online Account Access Troubleshooting Guide
Steps to Enable Pop-Ups
Some activities in online account access use pop-up windows to allow members to access information without ending their online account access session. Your browser must permit pop-ups from online account access for these functions to work as intended. Follow the steps listed below to make sure your browser will permit pop-ups from online account access.
Choose Safari / Block Pop-up windows, then uncheck Block pop-up windows
Note that Safari does not have a method to configure pop-up blocking on a per-site basis.
Screenshot and instructions based on Safari 6. Other versions of Safari should be similar.