can't load Photos Library from old iPhotos

I have a 2009 iMac running Yosemite OS 10.10.5. 2.66 GHz Intel Core 2 Duo, 8 GB memory (maxed out). I have 159.02 GB free of 639.28 GB and I have a 3 TB Seagate external, 2.55 TB free of 3.

I have had this problem a long time. It cropped up, I couldn't figure it out and I left it.

Now my husband is after me to fix it (he thinks I'm the tech guru here - ha!)

When I updated to Yosemite, my iPhotos program no longer was there, and I had to load the new Photos. It tried to load but keeps getting stuck at either 11 percent or 24 percent. I left it overnight once and it still did not load any further.

I am wondering if I do not have enough memory for it on the internal drive. Thoughts?

There are two libraries: iPhoto library (which asks for the updater) and iPhoto library 1, which is the one I am currently trying to load. I hope this iPhoto library 1 has all my photos. Crossing fingers.

I saw something in the forum that said you need to run ANDRUN or something like that and then do something with iPhoto. 1) I don't know where to get this program and 2) I don't have access to iPhoto any more.

I am worried about all my many pictures I had in iPhoto. Now I have more photos in my phone and iPad that I can't load.

Help!