Some weird problem installing El Capitan

[soamz]

I had a Apple Developer account last year when I had installed El Capitan Beta to one of our Mac and then my account has expired and now El Capitan Stable has been released.

I have tried downloading it from Mac App Store 3 times and it says , "AN Error has Occured" After the last few seconds of the installation.

So what could it be ?

See attached

 

[splifingate]

Make sure to search and destroy any Install OS X El Capitan.app that may be lingering, on any drive, folder, or partition, then verify which update catalog you are using:

sudo defaults read /Library/Preferences/com.apple.SoftwareUpdate CatalogURL

The following will return you to the production catalog:

sudo /usr/sbin/softwareupdate --set-catalog https://swscan.apple.com/content/catalogs/others/index-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz

or (though I have not tried, personally):

sudo /usr/sbin/softwareupdate --clear-catalog

I had a similar problem last week, and @Pike R. Alpha helped me get it straight.

See:

https://pikeralpha.wordpress.com/2015/09/17/catalogurls/
https://pikeralpha.wordpress.com/2014/04/17/os-x-mavericks-10-9-3-build-13d43-seeded/