Debugging macOS X Yosemite 10.10 installation - DVD DL - EN

Graphical User Interface (GUI) Installation
1.  BACKUP everything you need before you proceed.
2.  Disconnect your mac from the internet, you’ll reconnect after the installation is complete.

3.  Reset system parameters NVRAM / PRAM

For this, shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart.

This will return the system to its default parameters. If any software or hardware update was made that’s not 100% compatible with the original machine, then there is a possibility that it won’t work anymore as expected.
This will also ensure that any hardware changes are registered with the machine. You need to do this each time you add new hardware.

4. Change the system date :
For this, start the mac on DVD pressing the C key.
Then open a Terminal and type : date 0518171215

5. Use the Disk Utility to format the volume where you want to install as Mac OS extended (journaled).
Then close the Disk Utility and continue the installation.

6. Please take photos of any error messages, it helps with the debugging.

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Command line Installation

1.  BACKUP everything you need before you proceed.
2.  Disconnect your mac from the internet, you’ll reconnect after the installation is complete.

3.  Reset system parameters NVRAM / PRAM

For this, shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R.
You can release the keys after about 20 seconds, during which your Mac might appear to restart.

This will return the system to its default parameters. If any software or hardware update was made that’s not 100% compatible with the original machine, then there is a possibility that it won’t work anymore as expected.
This will also ensure that any hardware changes are registered with the machine. You need to do this each time you add new hardware.

4. Format the partition on which you will install.
Start the mac on DVD pressing the C key.
Use the Disk Utility to format the volume where you want to install as Mac OS extended (journaled).

5. Change the system date :
Open a Terminal and type : date 0518171215

6. Run the installation command :
In the same Terminal window type the following :

installer -pkg /Volumes/Mac\ OS\ X\ Install\ DVD/Packages/OSInstall.mpkg -target /Volumes/"Macintosh HD"

Where Macintosh HD stands in for the name of the partition where you want to install.
Mind the space characters and keep the quotes around the name of the volume.

7. Please take photos of any error messages, it helps with the debugging.

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Common errors and their solutions:

* Error : The DVD is rejected.
Possible causes:
1. The optical drive is a tad dusty.
Fix: Cleaning it will have it running again at 100%

2. The optical drive doesn’t read DVDs DL (double layer)
Fix: Replace the DVD reader with any other internal or external that can read DL DVDs

3. There is an incompatibility between the OS and the machine.
Why it happens: These DVDs will only install the software on genuine Apple machines which contain genuine Apple parts which are compatible with each other.
Any hardware updates that were done outside of Apple shops are not covered.
Fix: try to undo any hardware updates and get the machine as close as possible to the original configuration.

Why it happens: The machine doesn’t support the OS.
Fix: You will need to try a different OS. Please be mindful that especially in the case of 10.10 Yosemite there are machines which don’t support it, but will run perfectly fine wil 10.11 El Capitan.

To make a diagnosis of your machine:

To run it from the DVD restart the mac with the DVD in the optical drive while pressing the D key.

To run it from the Internet remove the DVD from the drive and reconnect the Mac to the Internet. Start the Mac by pressing Option + D.

Here is a link to the meaning of the error codes, in case they appear:


Apple Diagnostics: Reference codes EN