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:
- Download Mac OS X 10.10 Yosemite from Apple Store
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Create a new Virtual HDD with at least 8 GB
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Open Terminal (Mac HDD -> Applications -> Utilities -> Terminal)
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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
- Open Finder, select Mac HDD
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Navigate to Applications -> Install OS X Yosemite
3, Right click on Install OS X Yosemite, and select Show Package Contents
- In Install OS X Yosemite mounted volume, Expand Contents -> SharedSupport
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Right Click on InstallESD.dmg and select Open With -> DiskImageMounter (default)
- In OS X Install ESD, right Click on BaseSystem.dmg, and select Open With -> DiskImageMounter (default)
Steps 2: Create Bootdisk Partition
- Open Disk Utility (Mac HDD -> Applications -> Utilities -> Disk Utility)
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Select harddisk for Bootdisk and select Partition tab
3. On Partition Layout, click on + button to add new partition
- Change Partition Name to Bootdisk, and click Apply button
- Click on Partition to proceed
Step 3: Create Mac OS X Bootdisk
- Open Disk Utility (Mac HDD -> Applications -> Utilities -> Disk Utility)
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Navigate to Bootdisk HDD -> Bootdisk Volume, select Restore tab
- Drag and Drop Bootdisk Volume to Restore Destination textbox
- Click on BaseSystem.dmg to show on Restore Source textbox
- Click Restore button and click on Erase button
- Enter Password if prompt
- Restore will proceed
Note: Bootdisk Volume name will be also renamed as OS X Base System
8. Right Click on Bootdisk Restore Volume and select Reveal “OS X Base System” in Finder
- In Finder, Right click on highlighted file OS X Base System and select Get Info
- On Name & Extension section, Rename to Mac OS X 10.10 Yosemite Bootdisk and press ENTER
- Copy Packages from OS X Install ESD Mounted Volume to Bootdisk
- Once Packages Copy is completed, Eject mounted volume used to create bootdisk
- 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