Reinstall El Capitan

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How to install (or reinstall) OS X. Boot from your Recovery HD partition by restarting your Mac while holding down the Command+R keys. Select Reinstall OS X, and click Continue. Click Continue to begin the process of installing or reinstalling OS X. Read the license agreement.

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

OS X could not be installed on your computer

  • Make sure the El Capitan installer (or at least a copy of it), called Install OS X El Capitan.app, is in its default location in your main Applications folder (/Applications). Select the text of.
  • Download El Capitan installation from the App store. It might complain that you already have it installed but download it anyway. It will be downloaded to /Applications and be named Install OS X El Capitan.app; Create a bootable image from the El Capitan installer on a USB stick larger than 6GB. In a terminal run.
  • Aug 26, 2021 El Capitan has a multi-step process to build an installer, and that path requires a second Mac and particularly a second Mac capable of running El Capitan. That’s discussed both in the Apple article, and in the other link. OS X 10.11 is at the edge of being able to make a secure network connection these days, too.
  • Aug 23, 2021 Reinstall El Capitan Without Losing Data Reinstall El Capitan On Imac I might ask if anyone knows how I can run the installer manually - from the command line I can cd to /Volumes and see my main hard drive and the downloaded dmg file 'Install OS X El Capitan'.

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

Reinstall El Capitan Without Internet

Quit the installer to restart your computer and try again.

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.

Os x el capitan reinstall

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.

Reinstall El Capitan Temporarily Unavailable

Disk

How To Download El Capitan

Easy fix, for a ridiculous error!