Login window only shows one user account

Spog19,

I believe your issue relates to FileVault being turned on on your Mac.

Users not enabled for FileVault unlock are only able to log into the computer after an unlock-enabled user has started or unlocked the drive. Once unlocked, the drive remains unlocked and available to all users, until the computer is restarted.

To Enable the users to be able to unlock FileVault Go to:

System Preferences > Security & Privacy > FileVault ( Tab ) > Click the Lock in the bottom right > Put in your administrator password > Should see an option to Enable Users > Enable User.

Hope that helps,

Weston

Supporting Articles,

OS X: About FileVault 2 - Apple Support

The lock is on the bottom left not bottom right. Sorry mixed that up.

Letting other users unlock the drive

If you want to make the Mac available to a user that doesn't currently have unlock capabilities, log in as a user that can unlock the disk. When you see your own desktop, choose "Log Out (user name)" from the Apple () menu. Also, you can unlock the disk, then switch to another user from Fast User Switch menu in the menu bar.

If you want to grant existing users the ability to unlock the drive on their own, open the Security & Privacy pane of System Preferences. Select the FileVault tab and click the lock icon in the lower left corner of the window. Enter your admin privileges when prompted. Click the "Enable Users..." button to add existing users to the list of accounts that can unlock the disk.

Hope that helps,

Weston

Supporting Articles,

OS X: About FileVault 2 - Apple Support