I think I can help here. If you use your card. Look at the top of the Android screen where you will see an icon showing the USB. Slide your finger down so you see USB connection and press. Change it to Windows Media Sync. Click OK. If you don't want anything to happen, change it back to Charge Only when you are through.
This may allow IPhoto or Finder to find your photos. If Not, I've sometimes had to restart the Mac. Use Import on Iphotos. Sometimes it will show the Droid when the Finder won't.
You can also follow this guide