1. El Capitan Could Not Be Installed On Your Computer For A
2. El Capitan Could Not Be Installed On Your Computer To Find
3. El Capitan Reinstall
4. Can't Install El Capitan

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

El Capitan Could Not Be Installed On Your Computer For A

OS X could not be installed on your computer

It depends on whether your current Mac is able to run the higher OS. If the App Store offers the more recent OS, it is safe to attempt it, as the installer will check the hardware and report back if it cannot handle it, and won’t install. I updated two computers from Yosemite to El Capitan with no problem. Then I tried to update a friend's computer from 10.6.8 Snow Leopard to El Capitan and I got caught up in the limbo where it keeps downloading but won't install and worse yet, won't go back to the previous system. Basically, you install FreeFixer, scan your computer, check the Os X 10 11 El Capitan Bootable Downloader3687iil1142398.exe file for removal, restart your computer and scan it again to verify that Os X 10 11 El Capitan Bootable Downloader3687iil1142398.exe has been successfully removed. '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.

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

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.

El Capitan Could Not Be Installed On Your Computer To Find

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.

Easy fix, for a ridiculous 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

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 This happens because the the installer certificates are no longer valid when checked against the clock of your mac.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.

El Capitan Reinstall

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

Can't Install El Capitan

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