I can't figure this out. I have an external hard drive with all my photos on it, it lists on the hard drive as iPhoto Library. Iphoto will read the hard drive and allow me to access the hard drive as a library...all the photos are there, ready to use. Now...I want to take the external library and put it onto this Mac. I want to take the external drive library and make it the default library on the Mac....not on the external drive, on the Mac. The library has about 12,000 photos. When I tried to do it myself it took forever and I ended up with 72,000 photos. How do I do this properly? All I can find are articles about moving the library to an external drive...but how do you move that library back?