Upgrade to El Capitan has replaced the boot on Configuration partition dual boot

I've been using find for a dual-boot my Macbook Pro with OSX and Ubuntu.  Today, I decided to upgrade my OSX Yosemite to El Capitan.

After downloading all the 6G, which took about six hours, and the installation program, I received a prompt to restart my computer.  After that, and waiting more than 10 minutes staring at a blank screen, I pressed the power button, but nothing happened.  After doing this several times and get in trouble in the meantime, I pressed and held.  To my surprise the blank screen is having a background slightly shine completely black color.  Then, I realized that the computer was actually still on, and I interrupted probably something I shouldn't.

Then I turned on my computer, and instead of being presented to the screen where I choose which operating system to load, I got OSX loading screen with the Apple logo and progress bar.  After some time, the OSX installer appeared and told me that it would take 19 minutes to install OSX.  However, after a minute and a half, the installer left with the message:

OS X could not be installed on your computer

A partition of start-up assistance is required when working with the storage of carrots.

Exit Setup to restart your computer and try again.


Product restarts the same result, as described above.

Using the disk utility program, I see that I still have my Ubuntu partition, although not like OS X doesn't shows being available and has no information about it other than its size.

As a customer, I am pretty upset by this situation.

Why don't/that the installer should overwrite the MBR?  It's totally useless!  Why the installation program could not upgrade the OS that he treated and leave the rest alone computer?  If someone at Apple has not considered the possibility that some of their users will want to double to start their systems?

Why are there not warnings or other information displayed during the preparation phase indicating that this would happen?  Why me staring at a screen empty while something, probably important, took place in the background and leading me to believe that my computer had hung up?  Surely a window could have been displayed saying something like "do not turn off your computer.

Now that I have my setup porked, I need to recover from an old backup, get kind of rEFInd running again, back up my Ubuntu installation and probably delete the partition.  Then try to upgrade to El Capitan again after the download of an another 6G.  Once El Capitan is at work, I'll have to recreate the EXT4 partition and restore Ubuntu top and install rEFInd.  This seems to be an arrangement rather STUPID having to cross in 2016.

Has anyone else had this problem?  If so, advice on how to get all this done effectively?

New user account is not happy!


Well, it seems that the recovery of my Time Machine backup is not so simple...

In the setup of OS X, utilities disk is available, so I ran it.

I've selected the partition where OS X is installed and choose the editing command-> restore from the menu, and then set the "restore from:' location to my partition backup (located on an external USB drive) and press ."

This produces a message saying "restore process has failed. Press OK to continue.  (Continue where?)

Open the details view showed me:

Validation of targets...

Validation of source...

Could not unmount volume "/ Volumes/Image . (No end of quote)

" Volume" (busy resource) (Who's using it?  (Not me!)

Operation failed...


I installed the following devices:

SM0512F SSD APPLE (disk0)

MyOSX (disc 1)

HGST (disk4) external drive

OSX_Backup (disk4s2)

Apple Media (DIS3) disk image

System basis of OS x (disk3s1)

Apple Media disk image (2)

OS X install ESD (disk2s2)

What volumes cannot be disassembled?  Apple media disk image?  Why?  What these volumes As make me writing disk4s2 to disk1?

I'll try to disassemble the Terminal and see if disk utility can help you.


Tags: Mac OS & System Software

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