El Capitan Could Not Be Installed

I have a Mac Mini, running now on OS X 10.11 El Capitan. When i open Resonance, or Shiva or Blackwell i get overtime the Error: The Application X11 could not be opened. During the installation of OS X El Capitan on my Mac Book Pro, the install fails and I am left with 'OS X Could not be installed on your computer File System verify or repair failed. Quit the installer to restart your computer and try again.' No matter how many restarts I do it does not install. Also repair does not work in disk utility. Os x could not be installed on you computer. No packages were eligible for install. What i did so far:-I rebuilt another usb drive from a new El Capitan freshly downloaded from the App store.-I formatted the hard drive, again.-I re tried to install but still the same.-I then held command+r and tried to install from there but I get the same issue.

I have a few MacPro3,1's at my school I'd like to update to El Capitan 10.11.6. Currently they're running 10.5.8. I've got really slow WiFi-internet access, but the MacPro's do not have Airport. How do I attack this?
I want to make an up-to-date USB-install stick. I know I need to get hold of El Capitan, but my personal MacBook Pro is still running Mavericks. I can only update to Sierra. So I have to find an El Capitan-running Mac, but if I manage to get hold of the El Capitan-installer, it will be tied to their Apple-ID, right? Will El Capitan install without internet access?

Installing El Capiton on an old Mac Book Pro today, I received the error:

OS X could not be installed on your computer

No packages were eligible for install. Contact the software manufacturer for assistance.

Quit the installer to restart your computer and try again.

I checked Appleā€™s support Matrix (it is a very old macbook pro) at https://support.apple.com/kb/SP728?locale=en_GB and it was listed as supported.

El Capitan Could Not Be Installed

After lots of Googling and investigation, I discovered that the date and time were not set to current, the macbook thought it was year 2000.

You can easily reset the time and date by following the steps below:

  • Click Utilities on the menu bar
  • Select Terminal
  • Type date
  • Confirm the date is wrong
  • Type date 062112422016 (example: June 21st 12:42 2016)
  • Exit terminal
  • Click Restart

Once the Date and time are configured you will be able to install OS X.

El Capitan Will Not Install

Easy fix, for a ridiculous error!