Upgrade to El Capitan not possible

[fabthi]

Hello everybody
I have an Early 2011 Macbook Pro (SSD+16GB ram) with Yosemite.
I'm trying to upgrade to El Capitan but after quite a while the installation process is started, I get this error message:
Could not install OS X on your computer - no packages eligible for installation
What does that mean? I checked carefully and the machine is compatible with El Capitan and even to install High Sierra.
I installed all system updates possible from AppStore on Yosemite before upgrading and I tried to upgrade to El Capitan from both the AppStore installer file and from a bootable USB, with the same disappointing result.
Any suggestion????

 

[Ritsuka]

Set the computer date back to 2016 and try again.

 

[fabthi]

Set the computer date back to 2016 and try again.

You mean the date on pc calendar?

 

[fabthi]

Set the computer date back to 2016 and try again.

Just tried, same thing "not possible"

 

[BrianBaughn]

Did you do it this way?:

Change Date in macOS via Terminal 2020 - FilioTech®

In this article, you will learn how to Change Date in macOS Catalina via Terminal.

www.filiotech.com

Your date needs to correspond to El Capitan. Try January 2016.

 

[fabthi]

Did you do it this way?:

Change Date in macOS via Terminal 2020 - FilioTech®

In this article, you will learn how to Change Date in macOS Catalina via Terminal.

www.filiotech.com

Your date needs to correspond to El Capitan. Try January 2016.

That works!!!!! Thank you guys so much!!!!
Two more last questions, as I'm willing to upgrade till High Sierra if possible:
1 - should I use always this trick (back date) when installing?
2 - from actual El Capitan can I jump straight to install HS?