We will run through the following steps to create a bootable USB for Mac. We do have a dedicated article about How to download old Mac OS X. Sudo /Applications/Install OS X Yosemite.app. Apple released the new Mac OS X 10.10 Yosemite in the Mac App Store for everyone to download and install for free on October 16th, 2014, but downloading a 5+ GB file for each of your computers will take some serious time. The best thing to do is download it once and create a bootable install USB drive from the file for all of your Macs.

1. Download create-bootable-installer-for-os-x-el-capitan.sh to the USB drive Boot into Recovery Mode Insert the USB drive.
2. Apple released the new Mac OS X 10.10 Yosemite in the Mac App Store for everyone to download and install for free on October 16th, 2014, but downloading a 5+ GB file for each of your computers will take some serious time. The best thing to do is download it once and create a bootable install USB drive from the file for all of your Macs.

A majority of Mac clients who are moving up to OS X Yosemite ought to experience the standard procedure using the Mac App Store and start the establishment from that point, it’s by a long shot the least demanding methodology and it by and large goes perfectly.

A few clients like to perform what is known as a spotless establishment of Mac OS X however, which is cleaning the Mac drive, and beginning crisp with a spic and span immaculate introduce of OS X Yosemite, and afterward physically replicating or getting to records and re-introducing applications.

While clean introducing isn’t especially troublesome, it’s viewed as further developed because it’s a substantially more active and protracted procedure than essentially refreshing to OS X 10.10 through the App Store.

• Simply ensure that once you have the establishment application for Yosemite in your Applications organizer, which will be named “Introduce OS X Yosemite,” that you don’t introduce it yet.
• When you introduce Yosemite, the document will consequently eradicate itself, so it’s critical to make a bootable drive first. If you need to introduce first and, at that point make a bootable drive, duplicate the installer application in another area so you can get to it later.

Also Read:-How to Clean Install Mac OS X Leopard 10.5 using USB

Step-by-Step Clean Installation of macOS X Yosemite 10.10 using USB

Back up the Mac with Time Machine or by physically duplicating your most significant information to an outer drive – never skip backing up your significant information.

• Append the OS X Yosemite bootable installer drive to the Mac, at that point reboot as typical.
• During boot down the OPTION key until a boot determination menu shows up, pick “Introduce OS X Yosemite” as the drive for sure (this is the USB installer).
• When the “Operating system X Utilities” screen shows up, pick “Disc Utility”.
• Pick the hard drive (or parcel) from the left side menu which is the goal for the spotless Yosemite introduction, at that point pick the “Eradicate” tab.
• Pick the Format type as “Macintosh OS Extended (Journaled)”, name the drive something self-evident (like Macintosh HD or Yosemite HD), and afterward pick “Delete” – this will design the drive/parcel and all substance on it.
• At the point when the drive has completed the process of arranging, quit Disk Utility to come back to the OS X utility menu.
• Presently from the “Operating system X Utilities” menu, select “Introduce OS X”.
• Navigate the Terms of Service and essentials, and select the crisply arranged “Mac HD” or “Yosemite HD” drive to set as the goal for the new introduction of OS X.
• Operating system X Yosemite will introduce a fresh start rendition of itself on the clear goal drive, giving the client a new beginning. Since the drive was organized first, no current working framework will be refreshed, and no different substance on the drive will be brought over.
• At the point when the establishment is fully completed, the Mac will reboot into OS X Yosemite and experience the ordinary new arrangement process.

Keep in mind, no information will be on the volume beside the crisp Yosemite establishment, so it’s dependent upon the client to re-introduce essential applications, modify inclinations, and above all, recuperate or move over again their significant records and documents.

Investigating Tips for troubleshooting purposes

• On the off chance that the establishment of Yosemite freezes, it’s likely because your USB drive is tainted here and there. This transpired on the main couple attempts, where it would freeze at 5 minutes left. The third USB stick I utilized was effective, and it took under 15 minutes for Yosemite to boot up.
• In case you’re getting an Undefined mistake: 0 admonitions when attempting to introduce, this more than likely implies that you neglected to perform Step 6 above, so make a point to duplicate over those two Base System documents.

Significant note

A clean installation of OS X Yosemite requires re-designing the Mac hard drive by formatting it, which means all substances on the drive will be expelled and deleted. Be certain you have your significant documents supported up before endeavoring this.

Necessary System requirements

• A Mac which can run OS X Yosemite – as far as framework prerequisites, the machines which bolster Yosemite are equivalent to that which can run Mavericks
• An OS X Yosemite bootable installer drive – generally this is a USB disc yet it tends to be whatever in the scenario that the drive is bootable, the installer independent from anyone else is lacking except if you’re crisp introducing onto an alternate parcel or volume. On the off chance that you haven’t made one of these yet, do that first.

Clean Install macOS X Yosemite 10.10 using USB

You can clean Install MacOS X Yosemite 10.10 using USB by accessing the link below. Also, make sure that you have enough back up before you proceed with the same. There are a lot of duplicate ISO images on the market and it is best to download the same from a trusted source.

The all now OS X 10.10 Yosemite is out now and its a free upgrade like Mavericks. It’s very simple task to upgrade an exsisting os to Yosemite with “App Store”. It’s actualy one click away from Yosemite. But if you need to install a fresh copy of Yosemite into your macbook, you will need either a DVD installer or a Bootable Yosemite installer.

Why a fresh install

Many people says slow issues after upgrading to old version Mavericks. And after upgrading some of your already installed apps wont work. Keeping a USB installer drive is a good idea to use it for recovery or troubleshooting purposes. And if you have one bootable installer, you can use it with your other Macs to install the Yosemite. It really really helps you by avoiding downloading the Yosemite installer file in each Mac.

What to backup

Before you start installing Yosemite, you should backup all the important data to an external resource. Installing the OS X is a kind of formatting your Mac. The process will wipe out the entire Hard disk. And more thing, you done need to backup or note a product key like windows product key in your mac. Mac doesn’t ask any product key while installing. Your Apple hardware is the product key for all your OS X installations.

OS X Yosemite hardware requirements

You should check wether your current hardware is compatible with Yosemite. Minimum ram required for Yosemite is 2GB. But 4 GB or higher is recommended for best performance. A hard disk space of 40GB is recommended for installing Yosemite with ease. Please note your entire HDD will wipe out while installing the Yosemite.

• Macbook air late 2008 or later
• Macbook Pro mid 2007 or later
• Mac mini early 2009 or later
• iMac mid 2007 or later
• Mac Pro 9 early 2008 or later

Making a USB installer is an easiest task if you already downloaded the Yosemite installer “.App” file. For downloading the file you should go to the “App Store” and then select the “Updates” tab on the top right position. Click on the “free upgrade” option for downloading the Yosemite installer file. The app file size will be 5.16GB as i can see here. Now the installer file is downloading to the /Applications directory.

You need a 8GB or higher capacity USB pen drive which formatted as “Mac OS Extended (journaled)”

Prevent auto deleting the downloaded file

Mac Os X Boot Disk

After completing the download you should copy the downloaded file from /Applications directory to somewhere (i.e. to desktop). Because the downloaded file will automatically delete after starting the automatic upgrade process. Make sure you copied to a different directory. The downloaded file name and extension should look like Install OS X Yosemite.app. Now you are not far from create bootable usb of yosemite.

Create bootable usb of yosemite

Now all set for create bootable usb of yosemite. Here in my case, i copied the Yosemite installer file “Install OS X Yosemite.app” to my “Desktop”. And my 16gb USB drive name is “Sandisk” and its plugged to my Mac. Now open the terminal and execute one command to make the stuff.

Download Mac Os X Yosemite Usb Bootable

NB: Make sure you give a different name for your USB drive than the your main HDD of your Mac.

Execute the below command to create bootable usb of yosemite. Done forget to change the directory names with yours.

sudo /Users/Sreekanth/Desktop/Install OS X Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Sandisk –applicationpath /Users/Sreekanth/Desktop/Install OS X Yosemite.app –nointeraction

After 10 to 20 minutes your all new OS X Yosemite bootable USB installer will be ready.

For more about OS X Yosemite visit Apple