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October 17, 2014 20:46
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| 1. Download Yosemite from the App Store (or your favorite digital content distribution warehouse) | |
| 2. Open terminal | |
| 3. Run "gem install iesd" | |
| 4. Run "iesd -i /Applications/Install\ OS\ X\ 10.10\ Developer\ Preview.app -o yosemite.dmg -t BaseSystem" | |
| Adding additional steps because certain files end up missing from above: | |
| 5. Run "hdiutil convert yosemite.dmg -format UDSP -o yosemite.sparseimage" | |
| 6. Run "hdiutil mount /Applications/Install\ OS\ X\ 10.10\ Developer\ Preview.app/Contents/SharedSupport/InstallESD.dmg" | |
| 7. Run "hdiutil mount yosemite.sparseimage" | |
| 8. Run "cp /Volumes/OS\ X\ Install\ ESD/BaseSystem.* /Volumes/OS\ X\ Base\ System/" | |
| 9. Run "hdiutil unmount /Volumes/OS\ X\ Install\ ESD/" | |
| 10. Run "hdiutil unmount /Volumes/OS\ X\ Base\ System/" | |
| 11. Run "hdiutil convert yosemite.sparseimage -format UDZO -o yosemitefixed.dmg" | |
| 12. Add yosemitefixed.dmg as a live cd in virtual box | |
| 13. Change the chipset of your virtual machine to "PIIX3" | |
| 14. Start your VM, open Disk Utility within installer and create a new HFS+ partition on the virtual disk | |
| 15. Install it! |
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Have found a solution to do it from Mavericks (Maybe work for earlier os versions) from command line itself. Works perfectly for me & creates a 6 GB ISO for Yosemite. here are the instructions:
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 10g /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/
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.sparseimageConvert 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