You want to ensure a calm, successful update with no data loss or other unpleasant surprises.You should buy this ebook if one-or both-of the following describes your situation: Want help with installing a later version of Mac OS X? Check our catalog for new editions of this ebook that will help you with later upgrades. Solve problems that might arise after installing-such as a Mac that won’t boot.Perform a few important post-installation tasks and tweaks.Successfully install Snow Leopard on an Intel-based Mac.Understand just what you need to know about what the installer will do.Make a bootable duplicate in case Joe’s easy Plan A doesn’t work for you.

Complete crucial pre-upgrade steps that help you avoid trouble.

Evaluate if your Mac is ready to run Snow Leopard.Joe’s friendly, expert steps-developed over innumerable test installations-help you to avoid trouble, understand what’s going on when you install Snow Leopard, and easily recover from problems that might arise. Fortunately, many thousands of people have upgraded Mac OS X calmly and successfully with Joe Kissell’s previous best-selling Take Control of Upgrading… titles.

The linked article hit my questions' topics but I did not deeply understand nor the configuration of the Apple ID on the fresh installed El Capitan nor the legal aspects of the solution.Installing a major new version of Mac OS X should be exciting and fun, but without proper guidance you may find it nerve-wracking or even lose valuable files. use it to do a clean install on my iMac (erasing all disk content before choosing the HDD in which to install El Capitan).use a Mac of a friend of mine which runs El Capitan to download El Capitan from Mac App Store.This reading brought me to another solution: Alternative solution Said that, after some search, I found this macworld article showing alternative methods to upgrade from 10.5.8 MacOSX version to a more recent one. use the App Store to download and install El Capitan.buy the DVD of Snow Leopard (10.6) from online Apple Store and install it on 10.5.8.✘ MacOSX 10.6.8 is required to be installed (due to Mac App Store introduction) on the iMac Official solution (or what I undestood reading Apple website) ✔ my iMac version is listed under the upgradable devices Now I want to upgrade my OS to El Capitan (10.11). I have an iMac(Early 2009) running Leopard (10.5.8).

Mac os x snow leopard upgrade