One way to save yourself the hassle is grabbing the Mac update on a USB thumb drive and installing the update using same drive on all your Macs. It can be quite easy making an update to the OSX 10.10 Yosemite from the Mac App store for one computer, but when it comes to making updates for several Macs, or even doing a fresh install, you might find it really stressful having to make those updates separately. You may then boot up from it by holding the option key down and then. If you prefer to make a bootable dvd, you can do it this way: After downloading the full Yosemite installer app from the Mac App Store, run these 14 commands in Terminal to create a Yosemite.iso file and then burn it to a dual layer DVD with Disk Utility. Diskmaker will then ask you to select the drive you want to use as a Yosemite bootable drive. If it doesn’t detect the installer, click on “Use Another Copy” to navigate to the installer you want to use. All of my directories and files are there.
The odd thing is, however, that when I boot into Yosemite from the external drive, I can see that my Mavericks drive looks OK. The problem is that my Mavericks boot drive is now called “OS X Installer” and when I boot it I am put into the Yosemite installer. The app will offer to make installers for OS X 10.8, 10.9, and 10.10, but we're. Once you've obtained all of the necessary materials, connect the USB drive to your Mac and run the Diskmaker X app. These instructions will also work for Mac OS X 10.9 Mavericks (excluding a Yosemite-specific step) and differ significantly from the instructions for creating a Mac OS X 10.6 Snow Leopard installer. In this post, I will go over instructions on how to create a bootable USB flash drive containing the Mac OS X 10.10 Yosemite installer.
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