[GUIDE] Creating a **good** Mountain Lion USB

[dalby]

Hi there

I have used Scottish's guide for making the Mountain Lion USB installer. However it does't work!

When i restart computer first i get the "apple" logo on screen. Then after two minutes a strange "failure" logo comes on screen a nothing more happens.

I have tried making the USB installer twice using the guide. Any ideas?

Kristian

Read my reasons to make a full installer below!

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Big problems with the installation of operating system on Imac!

Hello

I bought a used Imac (just over a year old). It is born with Lion which was on the machine when I got it.

When I tried to install the machine again I started to erase the hard drive and insert my USB key with Mountain lion that I have used on my other Macs, to create a "Clean install".

The problem comes at the error message I repeatedly get after a few minutes of installation. Note the computer is connected to the Internet, and I have tried both wired and wireless on several different networks.

Error message: "Can not download the additional components needed to install Mac OS X"

I have also tried to install Lion with the USB key and get the same error message.

Next, I tried to make "internet recovery" by pressing "cmd + alt + R". The installation starts.

However, I get the exact same error message again, after the computer has been running the installation a few hours!

PT, I have an Imac which can not be used for anything.

Apple Support had no other advice than to try on a different network, as they believed the error was due to the network!

I currently have tried 3 different wireless network and 2 wired and spent between 10 and 15 hours on the project.

Has run out of good ideas!

Experience or advice very welcome! ...........

Regards Kristian

 

[BeyondtheTech]

After being unable to install Snow Leopard, Lion, and Mountain Lion on my father-in-law's stubborn 2009 iMac, I followed this guide to the T and Mountain Lion is back in action.

Thanks for a great guide. I don't know why all the other OS'es were failing with the infamous "Can't download additional components" even though the network was completely turned off, but after using this particular method of extracting the OS to the flash drive (unlike the previous simple "restore DMG to flash drive"), this flawlessly installed OS X back to the hard drive.

 

[Oui]

CCC Select source select destination select copy wait until done simple.

 

[elect86]

I have a little problem, when I restore the baseSystem.dmg, it also restore the same space left (available) that is something around 120 MBs.. and therefore I do not have enough space to copy back all the Packages...

Why?