El Capitan Could Not Be Installed On Your Computer

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If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first. If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD. Allow installation to complete without putting your Mac to sleep or closing its lid. Mac Notebook computer users, connect your computer to the power. Then make sure you have a stable internet connection and execute the download and installation. Visit our website and get the direct download link to El Capitan. Click on the Continue in the installer and follow the instructions on the screen to complete the installation. Steps Permalink. From the “MacOS could not be installed on your computer” screen: Press and hold “option” key and click restart. In the “Startup disk selection” screen, use the arrow keys to select your main hard drive (not the MacOS update) Wait for your Mac to boot normally. 'OS X Could not be installed on your computer. But I was confident that 11 would make running El Capitan as guest OS a piece of cake.

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.

Installed

El Capitan Could Not Be Installed On Your Computer System

I checked Apple’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 on your computer to change

Install El Capitan Os

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
El capitan could not be installed on your computer to make

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

El Capitan Could Not Be Installed On Your Computer

El Capitan Reinstall

Easy fix, for a ridiculous error!

El Capitan Could Not Be Installed On Your Computer To Make

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

Oh dear… When trying to install OS X 10.11 (El Capitan) you may encounter this message. This happens because the the installer certificates are no longer valid when checked against the clock of your mac.

Don’t panic though as this is easily fixed using Terminal, so don’t restart immediately.

  • Click Utilities on the menu bar
  • Select Terminal
  • Type date 062112422016
  • Exit Terminal
  • Click Restart

When you restart the mac and try the installer again it will now believe the certificates are valid and will continue as it should.