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How to create a Bootable Yosemite install.

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Prerequisites

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1)?Ensure your Mac is compatible with OS X Yosemite. These are the supported devices:

  • iMac?(Mid 2007 or newer)
  • MacBook?(Late 2008 Aluminium, or Early 2009 or newer)
  • MacBook Pro?(Mid/Late 2007 or newer)
  • MacBook Air?(Late 2008 or newer)
  • Mac mini?(Early 2009 or newer)
  • Mac Pro?(Early 2008 or newer)
  • Xserve?(Early 2009)

2)?Back up important data and settings (photos, videos, music files, documents and the like) on your Mac to an external hard drive. You can do this by using the Time Machine feature in Mac OS X, or third-party software such as?Carbon Copy Cloner.

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3)?Create a bootable USB flash drive with a storage size of at least 8GB.

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4)?Download?OS X 10.10 Yosemite Final?from the Mac App Store and save it to the Applications folder – its default location.

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How to Create Bootable USB Flash Drive

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First, create bootable USB flash drive. Here is how you do it:

Plug in your USB drive into the computer and open Disk Utility?(in Applications).

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  • Select the USB drive?from the left sidebar and click on Erase?tab.
  • Choose Mac OS Extended (Journaled)?in the format box and let the name be Untitled (default).
  • Now click on Erase button?and wait until the format process completes.

Jxc.png

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  • Then choose Partition tab and select 1 Partition?from Partition Layout?dropdown menu. Click on Option and ensure GUID Partition Table?is selected as the partition scheme, with its name set to Untitled.

Kxc.png

  • After downloading the OS X 10.10 Yosemite instakker from the Mac App Store, just quit the installer and set the downloaded file's name to Install OS X Yosemite.app.
  • Launch the Terminal?app (in Applications/Utilities) and type or paste the following command in, and then hit Enter:
sudo /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install OS X Yosemite.app --nointeraction

Note:?The code above has missing double dashes in the quotes. Please replace a single "-" with "- -" when you enter the above command line in the terminal.

  • This will create the bootable USB flash drive. This takes between 10-20 minutes. Do not interrupt the Terminal or eject the flash drive?during the process. Once the process completes, you will see the message "Copy Complete. Done."

The OS X Yosemite bootable USB flash drive will be ready for use and you can start the clean installation process.

How to Clean Install OS X Yosemite on Your Mac

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Step 1:?Ensure the bootable USB flash drive?is plugged into your Mac and restart the computer. As soon as the start-up chime plays, press the Option?key (Alt).?

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Step 2:?Choose the USB drive on the start-up drive selection screen and hit Enter/Return?on the keyboard.

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Step 3:?Wait until the Yosemite installer?appears on screen. This could take a few seconds or minutes.

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Step 4:?Click on Disk Utility?and then hit Continue.

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Step 5:?Click on Macintosh HD?from the left hand-side pane and then hit Erase tab on the top-right portion of the window. Leave all the settings at their default values and then hit Erase button at the bottom right. This will wipe all files stored on your startup hard drive.

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Step 6:?When the erasing process is complete, return to the first screen where you selected Disk Utility. Now click on Install OS X?and then hit Continue.

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Step 7:?Choose the Macintosh HD?partition you erased in step 5 and then click Install.

If you have followed all the steps correctly, your computer should now boot right into the newly installed operating system, OS X Yosemite, and you could cherish its stunning new UI.

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Create bootable Yosemite ISO

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1 - You need download?Install OS X Yosemite.app

2 - Run this script in Terminal:

#!/bin/bash

# Mount the installer image
hdiutil attach /Applications/Install\ OS\ X\ Yosemite.app/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app

# Convert the boot image to a sparse bundle
hdiutil convert /Volumes/install_app/BaseSystem.dmg -format UDSP -o /tmp/Yosemite

# Increase the sparse bundle capacity to accommodate the packages
hdiutil resize -size 8g /tmp/Yosemite.sparseimage

# Mount the sparse bundle for package addition
hdiutil attach /tmp/Yosemite.sparseimage -noverify -nobrowse -mountpoint /Volumes/install_build

# Remove Package link and replace with actual files
rm /Volumes/install_build/System/Installation/Packages
cp -rp /Volumes/install_app/Packages /Volumes/install_build/System/Installation/

# Copy Yosemite installer dependencies
cp -rp /Volumes/install_app/BaseSystem.chunklist /Volumes/install_build/BaseSystem.chunklist
cp
-rp /Volumes/install_app/BaseSystem.dmg /Volumes/install_build/BaseSystem.dmg

# Unmount the installer image
hdiutil detach /Volumes/install_app

# Unmount the sparse bundle
hdiutil detach /Volumes/install_build

# Resize the partition in the sparse bundle to remove any free space
hdiutil resize -size `hdiutil resize -limits /tmp/Yosemite.sparseimage | tail -n 1 | awk '{ print $1 }'`b /tmp/Yosemite.sparseimage

# Convert the sparse bundle to ISO/CD master
hdiutil convert /tmp/Yosemite.sparseimage -format UDTO -o /tmp/Yosemite

# Remove the sparse bundle
rm /tmp/Yosemite.sparseimage

# Rename the ISO and move it to the desktop
mv /tmp/Yosemite.cdr ~/Desktop/Yosemite.iso

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3 -?Burn the .ISO in Pendrive, and enjoy!

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Source:?Ibtimes?and?AppleInsiderForum

Credits for help:?Duran Keeley

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2 answers to this question

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This information is useful, but if the mac is broken, how do you download the needed files from Apple play store??

I am certainly not going to go to the apple store.?

The more I have looked around online the more I have concluded that there is a lot of help and advice but you cant find the files needed to get any real work done.?

Did anyone consider just putting the ISO files up online directly or putting them in dropbox accounts for easy access??

I am sure you have, but I will have to echo what I am sure others have said and thought, that it is very difficult to find the needed files to accomplish this.?

Any help is greatly appreciated. ?Download links? ? ?This one is broken.?

https://www.nitroflare.com/view/5BD00A53A00F7A7/10101usb.iso

So far I have a real mac dead in the water. A1224?

I have also read that my HP envy makes a good mac so I would like to find the files to allow me a dual boot on my laptop.?

THe Envy is a 17 touchsmart with an intel video on the chip and 16 gigs ram and 1T hard drive.?

I am considering putting another drive in the computer for storage or SSD for fast dual boot. The jury is still out on that project. I am still reading and lining up the parts to add the second drive.?

I also found a touch screen kit for the A1224. Anyone ever add one to a mac and use it? I think a touch would be great... especially for music editing and playing.?

Also when I program telephone switches. Touch makes it so much easier.?

Thanks Mr Moderator for looking this over... there is much here... and I have a real mess to straighten out.?

In the last two weeks by reading I have learned more about Mac's I think than many of the garden variety users... nice system.?

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In the last two weeks by reading I have learned more about Mac's I think than many of the garden variety users... nice system.?

hm no prob.but this is for mackintosh section. can you post a topic in notebook or in titled sections

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thanks

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