Oct 18, 2014 Update: the app I had previously used to create bootable OS X instal disks, DiskMaker X, doesn’t work reliably for Yosemite. And the developer seems to have lost interest in the project with version 4b4, which has not been updated since October of last year. So I returned to this article to do it Topher’s way.

1. How To Make Bootable Os X Yosemite Disk

• Nov 03, 2020 In the Terminal window that opens, enter one of the following commands, depending on which OS X or macOS installer you're working with. Note that they use the example name FlashInstaller for our USB drive, so if you named your drive something else, use that name.
• Once you have the installation app for Yosemite (Install OS X 10.10 Developer Preview), don’t install it directly, other wise you will lose the file and can’t make the USB disc. To get started all you nee a.GB or above USB drive, Apple computer with Mac App Store (10.6.8+) and OS X Yosemite installer. Create OS X Yosemite Bootable USB Drive.
• Oct 20, 2014 Creating a bootable OS X 10.10 Yosemite USB drive is very easy. All you need is a Mac, as the tools provided for the process are only available in OS X, and a USB drive with a capacity of 8 GB (or.
• Download OS X Yosemite App, get it from the Apple Store. Open Terminal and use the command below. Make sure the Yosemite App is located on your Desktop of your Mac. NOTE: Change the USB name to MyVolume or you can change code “MyVolume” to the same name as your USB drive.

OS X Yosemite final version is available to download from App Store. Download and update it from OS X App Store or create a Bootable installer drive so you can easily use this installer USB drive to clean install OS X Yosemite or to install OS X 10.10 on multiple computer without downloading again and again on different computers. There a re few requirement before start following this guide.

See also: Dual Boot OS X Yosemite and OS X Mavericks

• Check, Is your Mac capable to run OS X Yosemite?
• You need a 8 GB or higher capacity USB drive or a external hard disk.
• Save data from your USB or Hard disk drive because we need o format it.
• OS X Yosemite.app installer file.

Prepare USB Drive for OS X Yosmite

First we need to format USB drive using built-in tool Disk Utility. Run Disk Utility tool from Applications > Utilities.

Here on Disk Utility interface,

1. Select USB drive from left-side.
2. Click the Partition Tab.
3. Click Partition Layout drop-down and select “1 Partition” option.
4. Enter the partition name “osxyosemite” and select “Mac OS Extended (Journaled)” from Format drop-down menu.
5. Click the Options button

Select “GUID partition Table” and click the OK button and then hit Apply and create a partition. This will take some time to format and create a new partition.

Make OS X Yosemite Installer USB Drive

Download “Install OS X Yosemite.app” from App Store, its a big download so make sure you have a good internet download speed.

Once downloaded the setup this will start the installer automatically so quit the installer setup.

Open Applications folder and confirm the “Install OS X Yosemite.app” file is available there.

Burn OS X Yosemite on USB

To start the making bootable USB drive you need to open Mac Terminal. Press CMD+Space from keyboard, find and run Terminal app.

Once Terminal is running, copy and paste the following command in Terminal and hit the Enter key to execute the command. Here you may need to enter the admin password, If prompted for the password enter the administrator password and hit Enter key.

This will start making OS X Yosemite installer USB Drive and will take about 20 minuets, so be patient and don’t remove the drive from computer and also stop doing any other task while making installer USB.

Once you see Done message on Terminal window, you are good to go and install fresh OS X Yosemite or even use this bootable installer USB drive on different computer to install OS X Yosemite.

Boot from USB Drive

To boot form USB drive you need to reboot you Mac and press Option key while rebooting on start-up. You will see options to select drive to boot from.

How To Make Bootable Os X Yosemite Disk