My entire iPhoto library is missing now that I have upgraded to El Capitan

Go to the App Store and check out the Purchases List. If iPhoto is there then it will be v9.6.1

If it is there, then drag your existing iPhoto app (not the library, just the app) to the trash

Install the App from the App Store.

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Sometimes iPhoto is not visible on the Purchases List. it may be hidden. See this article for details on how to unhide it.

http://support.apple.com/kb/HT4928

One question often asked: Will I lose my Photos if I reinstall?

iPhoto the application and the iPhoto Library are two different parts of the iPhoto programme. So, reinstalling the app should not affect the Library. BUT you should always have a back up before doing this kind of work. Always.

First look in your Pictures folder to see if the iPhoto library is there. Then if you had some version of iPhoto 9 on your Mac before the upgrade to EC follow the directions posted by Tererence Devlin in this post:

Terence Devlin

Apr 14, 2015 11:21 AM

Re: Is Iphoto gone ? i want it back!

in response to Johannes666

Recommended

Go to the App Store and check out the Purchases List. If iPhoto is there then it will be v9.6.1

If iPhoto 9.6.1 is there, close the App Store, drag your existing iPhoto app (not the library, just the app) to the trash and then go back to the App Store.

Install the App from the App Store.

Sometimes iPhoto is not visible on the Purchased List. it may be hidden. See this article for details on how to unhide it.

http://support.apple.com/kb/HT4928

One question often asked: Will I lose my Photos if I reinstall?

iPhoto the application and the iPhoto Library are two different parts of the iPhoto programme. So, reinstalling the app should not affect the Library. BUT you should always have a back up before doing this kind of work. Always.

NOTE: the key to this is to move your current iPhoto application to the Trash bin in the Dock (don't empty yet) before going to the App Store.