Safari turns on its pop-up blocker by default, which may prevent a successful login.  ACTIVE Works® Endurance uses pop-ups, so the pop-up blocker will need to be turned off before logging in.
 

Safari for Mac OS X:
  1. Open Safari
  2. In menu bar, click Safari.
  3. If pop-up blocker is turned on, a box beside Block Pop-up Windows will be selected
  4. To turn blocker off, clear the box
​Safari for Windows:
  1. Open Safari
  2. Click Settings button
  3. If pop-up blocker is turned on, a box beside Block Pop-up Windows will be selected
  4. To turn blocker off, clear the box