Jesus Vigo goes over the steps to create a bootable USB to install OS X 10.9 (aka Mavericks).
Creating a USB Installer for Apple OS X 10.9
Before proceeding, you’ll need the following items to complete the process:
- 8 GB USB Flash Drive (or SD Card)
- Install OS X Mavericks.app (installer downloaded from Mac App Store)
- Apple computer with Mac App Store (OS X 10.6.8+)
- User Account with Administrative privileges
Follow these steps:
- Using a Mac with at least OS X 10.6.8 installed, access the Mac App Store and download the Mavericks (10.9) app installer
- Insert the USB drive into the Mac and launch Disk Utility
- Click on the USB drive from the left-hand menu and select the Partition tab
- Click the drop-down menu, selecting 1 partition
- Select Mac
OS Extended (Journaled) for the format-type from the drop-down menu (Figure A)
- Click on the Options button, select the radio
button for GUID Partition Table, and
click OK (Figure B)
- Launch the Terminal.app by selecting it from
the /Applications | Utilities folder and execute the following command (Figure C)*:
defaults write com.apple.Finder AppleShowAllFiles TRUE;\killall Finder;\say Files Revealed
- Upon completion of the USB formatting, locate Install Mac OS X Mavericks.app
(downloaded in step #1 to the Applications
folder, by default). Right-click the file and select Show Package Contents (Figure D)
- Navigate the file structure Contents | Shared
Support and double-click the InstallESD.dmg
file mount OS X Install ESD on the
desktop (Figure E)
- Double-click
the mounted .dmg file and locate the hidden BaseSystem.dmg (Figure F)
- Go back to Disk Utility and click on the newly formatted USB Drive in the menu, then click on the Restore tab
- Drag
the BaseSystem.dmg over to the Source text box. For Destination, drag and drop the partition created on the USB drive
onto the textbox (Figure G)
- Upon
verifying that the fields are correct, click the Restore button and select Erase
from the application, if prompted to do so (Figure H)
- The
process may indicate in excess of one hour, but in my experience, the process takes
significantly less time to complete (Figure
I)
- Once
the files have finished copying over, the drive should mount automatically.
Navigate the file structure to System | Installation and delete the alias to
the Packages directory (Figure J)
- Going
back to the mounted Install ESD.dmg file on the desktop (step #10), locate the directory named Packages and copy it to the
directory in step #15 (Figure K)
There you have it -- a bootable copy OS X Mavericks on USB
Flash Drive that can be used to install, upgrade, and/or troubleshoot compatible
Apple computers. The process has become a bit more cumbersome, but once all the
files are in their proper place, the USB drive works much the same. Simply
insert your drive, power on the computer, and hold down the Option key to
access the boot selection menu. From there, select the USB drive partition and
press enter to initiate the boot process.
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