![]() ![]() Step 2: Making the OS X Yosemite Installer Drive Now that the drive is ready, you can move on to making the actual installer. Click “Apply” and confirm the creation of the partition.Choose “GUID Partition Table” as the partition scheme and choose “OK”.Change the name to “Untitled” from ‘Untitled 1’ then click on the “Options” button. Next go to the “Partition” tab and under ‘Partition Layout’ click on the pulldown menu, changing it from “Current” to “1 Partition”.Click on the “Erase” tab and format the drive as “Mac OS Extended (Journaled)”, then choose “Erase” and confirm.Connect the USB drive to the Mac and launch Disk Utility, then select that USB drive from the left side drive list (be sure you select the USB drive you want to make the bootable installer from).If for some reason you have another drive named Untitled, change the name or don’t use it. When you format a fresh drive on a Mac it becomes labeled as “Untitled” so we’re going to assume that the boot destination drive is named Untitled as well. If you don’t want to erase the drive, find one you don’t mind formatting instead. This is going to format the drive so that it will be a bootable installer, without doing this the drive may not be bootable. Let’s get started: Step 1: Format the USB Drive to be Bootable The convenience of a portable flash drive is undeniable so it’s preferred if you’re going to be updating multiple Macs. How to Create a Bootable OS X Yosemite Installer Disk in 2 Stepsįor the purposes of this walkthrough, we’re going to use a 16GB USB flash thumb drive, but you’re free to use whatever you want, and you could even use an external hard drive if you really wanted to. Basically, if the Mac is capable of running OS X Mavericks, it is capable of running OS X Yosemite too. ![]() Of course, we’re assuming the destination Mac(s) that are going to get Yosemite are compatible.
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