How to Create a Mac OS X Mavericks 10.9 USB Boot Disk - Method 1

June 18, 2013

The video below will show you how to create a Mac OS X Mavericks 10.9 Developer Preview USB Boot Disk.

Unlike the method used to create a OS X Mountain Lion 10.8 USB Boot Disk, when creating a Mavericks USB Boot Disk, things are done slightly differently.

Tutorial: How To Create a Mac OS X Mavericks 10.9 USB Boot Disk

To Watch Method 2: How To Create a Mac OS X Mavericks USB Boot Disk in 3 Easy Steps click here.


In this Tutorial we'll be demonstrating How to Create a Mac OS X Mavericks 10.9 USB Boot Disk.

Let's Get Started

"What You'll need"
An Intel Based Mac System.At least an 8 or 16 Gigabytes USB Disk
(Make sure to make a backup as all data will be erased).

And finally, a downloaded copy of OS X Mavericks 10.9 Developer Preview.
(Currently only available to Registered Apple Developers)

Make sure that you have a backup of your hard drive whenever you're working with the Mac Disk Utility program.

How To Create a Mac OS X Mavericks 10.9 USB Boot Disk
After the download of OS X Mavericks Developer Preview from the Mac App Store is complete, Don't Press Continue but instead quit the install procedure as shown here. incidentally; pressing Continue will install Mavericks as an Upgrade on your current OS X, preserving all Apps and User Accounts on your Mac. Therefore, to perform a Clean Install of Mavericks on your Mac, we'll need to Create a OS X USB Boot Disk. Unlike the method used in Part 1 for creating a Mountain Lion USB Boot Disk from the Blueprint Series on this channel, Creating a Mavericks USB Boot Disk requires a slightly different approach. So; Assuming you have Mavericks, navigate to its location, usually downloaded to the Applications Folder, we need to Mount the InstallESD.dmg file Contained in the Mavericks Package and located in the SharedSupport Folder to the desktop, ((((Right Click on the Mavericks Icon and scroll to where it say "Show Package Contents" Now Double-click on the Contents Folder,))))) So, Navigate to the SharedSupport Folder (((((then Double-click on the SharedSupport Folder,))))) and double click on the InstallESD.dmg file to mount it to the desktop, the Mounted Disk folder, contains the Packages Folder plus additional Hidden files, The Hidden file we are interested in is named "BaseSystem.dmg", therefore we need to unhide this file, in order to do so, we'll need to Launch the Terminal Application and enter the following Default Command String to unhide the file and the command string to relaunch Finder. If yo have entered the command strings correctly, the BaseSystem.dmg file should be visible, we'll come back to this file later. Next we need to configure the USB Disk for Mavericks, launch the Disk Utility Application. Now we'll insert the USB Disk, when loaded, and In the Disk Utility window, click on the 16 GigaByte Flash Disk or whatever size you are using then click the Erase Tab, then the "Erase Button" here to start the erasing process, you will be presented with a confirmation dialogue box, press the Erase button to confirm, the process took about 18 seconds. We'll just time lapse it at this point. We next need to partition the USB Disk, make sure that you USB Disk is still highlighted now click the Partition Tab. This takes a few seconds to load. Once loaded, go to Partition Layout and click on the Current Drop-down list, then click on 1 Partition, now click on the Options Button, This will bring up the Partition Options Available. As this is an Intel-based Mac, and by default, the GUID Partition Table button is already selected, so we just need to press the OK Button and click Apply, Once the pop-up folder appears and when ready, press the Partition Button, This will begin to Partition the USB Disk in order for it to auto boot. The process took about 18 seconds, again, we'll just time lapse it at this point. Now that we have the USB Disk partitioned correctly, We are ready to copy the unhidden file BaseSystem.dmg onto it. Now press the Restore Tab, In order to proceed, MAKE SURE that the Untitled 1 Partition is highlighted, Drag and Drop the BaseSystem.dmg from the Mounted Disk Folder to the Source Area of the Disk Utility window. While in the Disk Utility window, Click and drag the Untitled 1 Partition to the Destination Area. Now press the Restore Button to proceed, you will then be presented with a Dialogue folder asking if you are sure, press the Erase Button when ready, you will finally be presented to enter your Admin details, enter your name and password and press OK to begin the first part of the USB Mavericks Boot Disk creation. The process took about five and a half minutes, we'll just time lapse it at this point. Once created, a pop-up folder will appear, showing the name of the USB Boot disk, which has been re-named to "OS X Base System", Along with all file and folders associated in it. Now...For the second and finally part, and in order to complete the creation of Mavericks USB Boot Disk, we need to delete the Alias file named Packages from the USB Boot Disk, the file is located in the "Installation Folder". So, navigate to the Installation Folder and locate the Packages file and Delete it by moving it to the Trash. Next, from the mounted Disk folder, copy the Packages Folder by Dragging and Dropping it to the Installation Folder of the USB Boot Disk. The process took about 18 and a half minutes, guessed it...we'll time lapse it at this point. And that's it, OS X Mavericks 10.9 USB Boot Disk is Ready for use......Enjoy! Let's not forget to re-hide the files in Finder, basically bring back the Terminal window and type or copy and paste the following Command String, and Add FALSE at the end to hide the files as before And Re-Launch the Finder by typing the following Command String. That's it, done like Dinner.

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