How can I switch from OSX Lion 10.7.5 to El Capitan on my end 2011 MacBook Pro?

How to move from OS X Lion 10.7.5 to El Capitan on my end 2011 MacBook Pro? I get an error 'install the distribution of the error signed by apple. I'm sure I need first to switch to something else, but I have no idea where to start.

1. check all your applications to ensure compatibility with ElCapitan.

When those you want to keep (as possible) have a compatible update: you can update after installation.

2 ElCapitan performs better with more than 4 GB of Ram, although in very low load systems, it runs on 2 GB.

3. your hard drive doesn't have to be "nearly complete."

4. go in the Appstore and download ElCapitan (the download comes in your Applications folder)

The installer is removed after installation, so if you like to keep a copy before starting the installation.

5. install all applications updated.

Tags: Notebooks

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