Go back to the “ OS X Install ESD” mounted drive, and copy the content inside “ Packages” folder and paste these files in to the “ Packages” folder you created in last step.Now create a new folder named “ Packages”. Once the restore process is finished, open the newly created USB drive and navigate to System > Installation and delete the file named “ Packages”.Now drag n drop “ BaseSystem.dmg” as “ Source”, and set “ USB drive” as “ Destination”, then click “ Restore” to begin the restore process.Go back to Disk Utility, and select “ BaseSystem.dmg” from the sidebar and then click the “ Restore” tab.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).Double-click to mount “ InstallESD.dmg”.

Right-click and choose “ Show Package Contents”, then open “ Contents” and open “ SharedSupport”.Go to the /Applications/ folder and locate the “ Install OS X 10.9 Developer Preview.app” file.Double Click OS X Mavericks 10.9.dmg and drag the installer to /Application folder.

Download Show Hidden Files app ( download here) and and click on Show Special Files.

Create a Bootable OS X 10.9 Mavericks Installer With a bootable install drive, you can perform clean OS X 10.9 install., you can also save your time and bandwidth if you have multiple Mac Machines. Unlike it’s predecessor, Mavericks require additional steps to make a bootable disk.

Following are the instructions to create OS X 10.9 Mavericks bootable USB drive.

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