Create a Bootable OS X Yosemite Thumb Drive – Simple Version

Open up disk utility and format your thumb drive as “Mac OS Extended (Journaled)”

Open up a terminal, and run the following command.  Change “USBdrive” to your USB Drives name.

sudo /Path/to/ --volume /Volumes/USBdrive --applicationpath /Path/to/ --nointeraction

Enter in your password and let it run.


sudo /Applications/ --volume /Volumes/OSXInstaller --applicationpath /Applications/ --nointeraction

Installing sshpass on OS X

Note: To install sshpass you need to make sure you have Xcode installed along with the Xcode command line tools.  You can download Xcode from the app store, and then install the command line tools from Xcode’s Preferences.

Now open up your terminal and run the following commands.

Download sshpass from source forge.

curl -O -L

Extract the tarball and cd into the directory.

tar zxvf sshpass-1.05.tar.gz && cd sshpass-1.05

make and install.

sudo make install

Now test and make sure it works

sshpass -V

You should receive the following.

sshpass 1.05 (C) 2006-2011 Lingnu Open Source Consulting Ltd.
This program is free software, and can be distributed under the terms of the GPL
See the COPYING file for more information.


How to Create a Bootable OS X Yosemite USB Drive from OS X


  1. 8GB+ USB drive with nothing important on it
  2. Computer running OS X

1. In Disk Utility format your USB drive as HFS+

2. Open up a terminal and mount the Yosemite Installer

sudo hdiutil attach /Applications/Install\ OS\ X\

3. Restore the Yosemite InstallESD.dmg to your USB drive.  Replace “USBDrive” with the name of your drive.  You will be prompted for a Yes or No.  Hit y and then Enter to continue and erase all the data on the USB drive.

sudo asr restore -source /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg -target /Volumes/USBDrive -erase -format HFS+

4. Delete and add some packages.

sudo rm /Volumes/OS\ X\ Base\ System/System/Installation/Packages
sudo cp -a /Volumes/OS\ X\ Install\ ESD/Packages /Volumes/OS\ X\ Base\ System/System/Installation/Packages

5. Copy some more files.

sudo cp -a /Volumes/OS\ X\ Install\ ESD/BaseSystem.chunklist /Volumes/OS\ X\ Base/System/
sudo cp -a /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg /Volumes/OS\ X\ Base/System/

7. Detach the USB Drive

hdiutil detach /Volumes/OS\ X\ Install\ ESD/

8. Plug the drive into a mac and start the installation.