Mac OS: Create Bootdisk for Mac OS X 10.10 Yosemite

This is comprehensive guide to create Mac OS X Bootdisk installer.

The guide uses VM but it should work the same on physical disk.

Pre-requisites:

  1. Download Mac OS X 10.10 Yosemite from Apple Store

  2. Create a new Virtual HDD with at least 8 GB

  3. Open Terminal (Mac HDD -> Applications -> Utilities -> Terminal)

  4. In Terminal, execute below command for Finder to show All files

defaults write com.apple.finder AppleShowAllFiles 1 && killall Finder

For detail, please refer to Mac OS: Set Finder to Show All Files

 

Step 1: Mounting Mac OS Installer DMG

  1. Open Finder, select Mac HDD

  2. Navigate to Applications -> Install OS X Yosemite

3, Right click on Install OS X Yosemite, and select Show Package Contents

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  1. In Install OS X Yosemite mounted volume, Expand Contents -> SharedSupport

  2. Right Click on InstallESD.dmg and select Open With -> DiskImageMounter (default)

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  1. In OS X Install ESD, right Click on BaseSystem.dmg, and select Open With -> DiskImageMounter (default)

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Steps 2: Create Bootdisk Partition

  1. Open Disk Utility (Mac HDD -> Applications -> Utilities -> Disk Utility)

  2. Select harddisk for Bootdisk and select Partition tab

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 3. On Partition Layout, click on + button to add new partition

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  1. Change Partition Name to Bootdisk, and click Apply button

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  1. Click on Partition to proceed

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Step 3: Create Mac OS X Bootdisk

  1. Open Disk Utility (Mac HDD -> Applications -> Utilities -> Disk Utility)

  2. Navigate to Bootdisk HDD -> Bootdisk Volume, select Restore tab

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  1. Drag and Drop Bootdisk Volume to Restore Destination textbox

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  1. Click on BaseSystem.dmg to show on Restore Source textbox

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  1. Click Restore button and click on Erase button

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  1. Enter Password if prompt

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  1. Restore will proceed

Note: Bootdisk Volume name will be also renamed as OS X Base System

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 8. Right Click on Bootdisk Restore Volume and select Reveal “OS X Base System” in Finder

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  1. In Finder, Right click on highlighted file OS X Base System and select Get Info

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  1. On Name & Extension section, Rename to Mac OS X 10.10 Yosemite Bootdisk and press ENTER

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  1. Copy Packages from OS X Install ESD Mounted Volume to Bootdisk

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  1. Once Packages Copy is completed, Eject mounted volume used to create bootdisk

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  1. Open Terminal, execute below command to revert Finder Show All Files to default setting
defaults write com.apple.finder AppleShowAllFiles 0 && killall Finder

For detail, please refer to Mac OS: Set Finder to Show All Files

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