How can I get iPhoto to run after power outage?

Backup your iPhoto library, depress and hold the option and command keys, launch iPhoto and rebuild your library.

Hopefully this will work. BUT since you have no backup you are 100% guaranteed to lose all your files including your photos sooner or later. And this might be the time. Your first priority should be to purchase an external hard drive at lease 1 1/2 times as large as your hard drive - larger is better - and start using Time Machine

LN

Note the commas

Backup your iPhoto library, depress and hold the option and command keys, launch iPhoto and rebuild your library.

1. Backup your iPhoto library

2. Depress and hold the command and option keys

4. Launch iPhoto ( do not release the held keys until you get the rebuild menu)

5. Rebuild four library

LN

Here's the same thing that Larry suggested but stated a little differently (I hope): make a temporary, backup copy (select the library and type Command+D) and apply the two fixes below in order as needed:

Fix #1

Double click on iPhoto in the dock with the Command+Option keys held down and rebuild the library.

Since only one option can be run at a time start with Option #1, followed by #3 and then #4 as needed.

Fix #2

Using iPhoto Library Manager to Rebuild Your iPhoto Library

Note: This creates a new library based on the LIbraryData.xml file in the library and will recover Events, Albums, keywords, titles and comments but not books, calendars or slideshows. The original library will be left untouched for further attempts at fixing the problem or in case the rebuilt library is not satisfactory.

Hope you can follow that.

OT

To make a temp backup for just this operation using finder select the iPhoto library (by default in your pictures folder) and duplicate it. On your hard drive if you do not have an external drive. On the EHD if you have one

LN

You must be running iPhoto 8 or earlier. Glad things are back to normal (whatever normal is these days).