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That volume will appear in the Finder as OS X Install ESD open it to view its contents. Double-click InstallESD.dmg in the Finder to mount its volume.In the folder that appears, open Contents, then open Shared Support you’ll see a disk image file called InstallESD.dmg.Right-click (or Control+click) the installer, and choose Show Package Contents from the resulting contextual menu.It’s called Install OS X Yosemite.app and it should have been downloaded to your main Applications folder (/Applications). Once you’ve downloaded Yosemite, find the installer on your Mac.Right-click (or Control+click) the Yosemite installer to view its contents. The procedure is a bit more involved with Yosemite than it was for Mavericks (which was itself a bit more involved than under Mountain Lion and Lion). Here are the steps for using it to create your installer drive. You’ll find Disk Utility, a handy app that ships with OS X, in /Applications/Utilities. If you like, you can rename the drive from its default name of Install OS X Yosemite, though I think it’s kind of a catchy name.
![how to install os x yosemite on mac from usb how to install os x yosemite on mac from usb](https://cdn.osxdaily.com/wp-content/uploads/2014/10/quit-the-installer-for-yosemite-610x480.jpg)
You now have a bootable Yosemite install drive.
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(see the screenshot above), which could take as long as 20 or 30 minutes, depending on how fast your Mac can copy data to your destination drive. Wait until you see the text Copy Complete. The program then tells you it’s copying the installer files, making the disk bootable, and copying boot files. The Terminal window displays the progress of the process, in a very Terminal sort of way, by displaying a textual representation of a progress bar: Erasing Disk: 0%… 10 percent…20 percent… and so on.