Anybody with the "Essentials.pkg" Error

Solve the problem by
1) Re Download the Yosemite installer.
2) Change to another USB drive, and i name it as USB.

Good Luck!

Hello, I had this essentials.pkg error too. What I did to fix it is I first redownloaded yosemite from the app store. After I did the unibeast process, I noticed that when I open up the contents of the usb flash drive that was just made, there are two files: 1.) Install OS X Yosemite 2.) Installer.failurerequests
I deleted the installer.failurerequests file. After I plugged in my unibeast usb and booted with the flag "-no-zp" and then the installer finished in roughly about 20 minutes.
Hope this helps one of you.

same problem here ...
still no fix for this problem ?

lunaoso said:

Try to boot with the flag" -no-zp" (no quotes).. I kept getting that error and this is what finally fixed it for me. Hope this helps someone.

Click to expand...

Took out my graphics card and used -x to get me through a kernel panic, -no-zp got me through the essentials.pkg issues. Now it's hung up on "The computer is restarting."

For me it was the RAM issue

I had 4x 4gb corsair ram sticks in

I removed all except 1 ram stick

installation worked after that with no flags

kushy123 said:

For me it was the RAM issue

I had 4x 4gb corsair ram sticks in

I removed all except 1 ram stick

installation worked after that with no flags

Click to expand...

Now I have said that, I got a crash running Multibeast to install drivers, then a checksum error on bios after reboot.

tried to repeat the same process and now am getting the Essentials.pkg error even with my ram taken out.... zzz

EDIT: Now working with -x -no-zp

This was happening to me but I got around it by removing 1 x 8GB stick of RAM leaving 1 x 8GB still in.

The thing is, I managed to install in this machine without a hitch before but used windows as I had problems with display resolution on a new super wide monitor. I tried to boot into Yosemite the other day and it would not boot with a waiting for DSMOS error, I decided to reinstall and that is when this essentials.pkg error started. I have no idea why it suddenly stopped working, the only hardware change I made is removing a firewire card and connecting up a new display.

I've put the other 8GB back in and all seems to working fine now. It's a weird error!

I have this problem.

I have tried all the recommended adjustments. -no-zp etc. to no avail.

I have a brand new Toshiba 16gB stick. I have tried all the USB ports: USB2 and USB3.

I have flashed the BIOS of the MSI Z971 AC to the latest version 4.7.

I am trying to install over the top of Mountain Lion 8.1.1

The previous posts seem to have been in 2014.

Is there a solution that I have not found on the site yet?

I'm completely out of ideas, except to install to a fresh SSD. Which would be a right pain.

Thank all, Steve.

A bit more on this, in case it helps anyone. Please see my earlier post.

Without changing anything else, I downloaded Mavericks from Appstore and ran Unibeast to create the bootable USB.

After a couple of false starts, the following flags allowed the installation of Mavericks

-x maxmem=4096 GraphicsEnabler=No.

The GraphicsEnabler flag is interesting. It's default is Yes and accommodates graphics cards. I am running on the MB graphics, so I figured I didn't need it.

Note that it installed to the SSD, which in other posters minds was the root of the problem.

I have since retried the Yosemite update, but with the same error message. This is telling me that:

- it's not the SSD
- GraphicsEnabler=No might be useful.

More info when it happens. Any insights gratefully received.