HT1338 I have OS X 10.6.8 on my mac and have just downloaded 10.7.4 (needed for imovie 11) but it will not update.

I have OS X 10.6.8 on my mac and have just downloaded 10.7.4 (needed for imovie 11) but it will not update. What has happened to the downloaded update?

When you downloaded Lion from the Appstore (and paid 29$) you have 10.7.4.
After the download you will find it in the Applications folder: that is the installer ! The installer vanishes when used, thus if you want to make an installer disk (to avoid a later redownload), you should do it before you run this installer. You can use "Lion Diskmaker" for that (use a 8GB USB stick), http://www.macupdate.com/app/mac/39701/lion-diskmaker/

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