Download El Capitan Outside of App Store
Here is a link to download the latest updates manually from Apple.

Here is a torrent file to download InstallESD.dmg, getting speeds of 1mbps+. OS X is free and open to public so this isn't illegal.

This file's SHA1 Checksum is 306a080c07e293b6765ba950bab213572704acec. Here is a list of official Apple checksums. So this is official and not been tampered with.



If you are a developer, or know one that will give you his credentials, you can download it from https://developer.apple.com/download