iPhoto has been discontinued by Apple. If you already had the latest version, it should continue to run normally for now but no additional updates are being released. It has been replaced by the new Photos app included with OS X 10.10.3 and later.
Photos can use libraries from iPhoto 8.0 or later and any version of Aperture. If you’d like to migrate a library from iPhoto 7 or earlier, use Apple’s free iPhoto Library Upgrader tool to prepare your library first.
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