Sanjaya Kumar

Q: El Capitan installation failed (error related to essentials.pkg)

I have a late 2012 27" iMac which was running Yosemite.

 

Today, when I tried to upgrade to El Capitan I repeatedly get the message:

 

OS X could not be installed on your computer

An error occurred while extracting files from the package "Essentials.pkg".

Quit the installer to restart your computer and try again.

 

I have tried repeatedly and keep getting the same error. Googling indicated that it may be a problem with non-Apple-memory -- I had 32 GB Crucial RAM -- so I replaced it with the RAM modules that originally came with the iMac but I ended up with the same error message.

 

How can I see details about what this error is? Should I go back to Yosemite (I do have up-to-date Time Machine Backups)? Any suggested fixes?

iMac (27-inch, Late 2012), OS X Yosemite (10.10.3)

Posted on Sep 30, 2015 12:31 PM

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Q: El Capitan installation failed (error related to essentials.pkg)

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