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There are two reasons for this problem. Either the iPhoto application is corrupted or it is the iPhoto Library that has corrupted. We can rebuild your iPhoto Library and see if that works or not.
Since you already tried normal rebuilding, we have to rebuild the iPhoto library using a third party application named iPhoto Library Manager. Download and install it from here (use the trial version) : http://www.fatcatsoftware.com/iplm/
Open iPhoto Library Manager. Select your iPhoto Library, click on Library menu in the top and select Rebuild Library. This will verify the library. Then click the Rebuild button on the right. After rebuilding, open iPhoto.
Please let me know if that didn't work, so we can continue troubleshooting.
Are you in iPhoto Library Manager app ?
Select your iPhoto Library in left column. Then at the top, you will see Library menu. Click it and you will see Rebuild Library
At which step are you having any difficulty ?
There are other indirect ways to get this fixed, but we can try iPhoto Library Manager again because it can create a fresh library without losing any of your data
Restart your Mac, and then open iPhoto Library Manager again. Select your iPhoto Library in left column, click on Library menu and select Rebuild again. Is it force closing ?
Add a bookmark of this page or add this page to your favorites, so you can get back to me after the restart.
This will take a while. Let me know if it crashes again, so we will rebuild the library manually.
Make sure you have enough space on your Mac.
Go to Apple > About This Mac. Click Storage and you can see the remaining space there.
Let me know how much space is left there
That is more than enough space. So no worries about space. Let iPhoto Library Manager to rebuild it.
iPhoto will open and close automatically. So don't interrupt the process
BTW Until the rebuild complete, don't open or use any other apps
Hi there, I'm just checking. How is it going ?
Sounds like you have a large iPhoto Library. Depending up on the size, it may take hours.
Sorry for the delay. How much to go now ?
Does the iPhoto Library Manager seems to be frozen ?
You should see a progress bar in iPhoto Library Manager. Is it almost done ?
The reason I'm asking is, It is not supposed to take this much time unless you really have a large library
After rebuilding, it may crash a few times as it is loading for first time. Go to your Pictures folder and tell me the size of your iPhoto Libraries
In Finder, click on Go menu and select Home. Open Pictures folder and you will see your libraries there (old and the rebuilt one). Select the and press Command and I. This will bring Get Info. What is its size ?
Also what is the size of the rebuilt library ?
Sorry for the delay. Go to your Pictures folder and how many libraries do you see there ?