04/10/13 09:46How to Make a Bootable OS X Mavericks USB Install Drive

Página 1 de 5http://osxdaily.com/2013/06/12/make-boot-os-x-mavericks-usb-install-drive/

How to Make a Bootable OS X Mavericks USB Install Drive

Just like other recent major Mac updates, OS X Mavericks arrives as an app thatwants to update the current OS X installation, and with a little work you can make abootable USB installation drive. This allows you to easily perform partitioning fordual boot situations, clean installs, upgrades on multiple Macs, and more, plus it’sjust really convenient to have for troubleshooting and simple future installations,without having to re-download OS X 10.9 every time you want to install it or performan upgrade.

But unlike before with creating prior version OS X boot install drives, the process isslightly different with Mavericks and requires an additional set of steps to make theinstaller actually function as a a bootable installer disk. It’s not too complicated, just abit more time consuming.

Before beginning, make sure the Mac you want to install Mavericks on meets the sys-tem requirements for 10.9. You will need OS X Mavericks (obviously), and an 8GB(or larger) USB drive that you don’t mind formatting, we’re using a USB thumb drivefor the purpose of this walkthrough but an external hard drive should work as well.

Create a Bootable OS X 10.9 Mavericks Installer

04/10/13 09:46How to Make a Bootable OS X Mavericks USB Install Drive

Página 2 de 5http://osxdaily.com/2013/06/12/make-boot-os-x-mavericks-usb-install-drive/

Download OS X Mavericks (get Developer Preview from Apple, devs only fornow) but do not install it yetAttach the USB drive to the Mac and launch Disk UtilityChoose the USB drive from the left side menu, click the “Partition” tab, select “1Partition” from the drop down menu, and then click the “Options” button to se-lect “GUID” as the partition type, click “OK” then click “Apply”Launch Terminal to show hidden files and relaunch the Finder using this de-faults command string:

defaults write com.apple.Finder AppleShowAllFiles

TRUE;\killall Finder;\say Files Revealed

Go to the /Applications/ folder to locate the “Install OS X 10.9 Developer Pre-view.app” fileRight-click and choose “Show Package Contents”, then open “Contents” andopen “SharedSupport”

Double-click to mount “InstallESD.dmg”Open the mounted ‘OS X Install ESD’ image, and right-click “BaseSystem.dmg”choosing “Open” to mount the image (BaseSystem.dmg is invisible by default,thus why invisible files must be made visible in the earlier step)

04/10/13 09:46How to Make a Bootable OS X Mavericks USB Install Drive

Página 3 de 5http://osxdaily.com/2013/06/12/make-boot-os-x-mavericks-usb-install-drive/

Go back to Disk Utility, then select “BaseSystem.dmg” from the sidebar andthen click the “Restore” tabWith “Source” set to “BaseSystem.dmg”, set “Destination” to the USB drive bydragging the USB drive into the box, then click “Restore” to begin – confirm thatcontents of the drive will be erased

When finished, go to Finder and navigate within the newly created USB drive toSystem > Installation > and delete the file (alias) located here named “Packages”– keep this window open

04/10/13 09:46How to Make a Bootable OS X Mavericks USB Install Drive

Página 4 de 5http://osxdaily.com/2013/06/12/make-boot-os-x-mavericks-usb-install-drive/

Go back to the ‘OS X Install ESD’ mounted drive, and drag & drop the “Pack-ages” folder into the /System/Installation/ directory you just deleted the Pack-ages alias from, let this large folder copy

Once that Packages folder is finished copying to the drive, the USB drive is nowready to be booted from which it can install OS X Mavericks from.

Booting from OS X Mavericks Install Drive

04/10/13 09:46How to Make a Bootable OS X Mavericks USB Install Drive

Página 5 de 5http://osxdaily.com/2013/06/12/make-boot-os-x-mavericks-usb-install-drive/

With the USB drive attached, reboot the Mac and hold down the Option keySelect the orange drive, labeled “OS X Base System 1! from the boot menuProceed with the installation as usual

Enjoy OS X Mavericks! By the way, if there is a more direct method to create abootable installation drive, we couldn’t figure it out. Trying to restore or use the In-stallESD.dmg file does not work like it used to in the past, but it’s entirely possiblethere is another way. If you know how to do it, send us an email, hit up @osxdailyon Twitter, let us know on Facebook, or hollar at us on Google Plus.