Image via Before You Start The obvious first step here is to. But before you do anything else, a word of caution: once you've used the OS X installer, it will automatically delete the file you need to make the backup disk, so you'll want to either make a copy of the installer or create your disk before you upgrade. You can use a USB flash drive, external hard drive, or DVD-R disc, but the USB drive is quicker. If you're using a USB drive, it has to be formatted as 'Mac OS Extended (Journaled)' and set to partition type 'GUID Partition Table' in order to work. Image via Once inside, browse to the ' Contents SharedSupport' folder where there will be a file called ' InstallESD.dmg.' This is the image file that contains the information you need to create the backup disk.

• Usb Installer Bootable Os X Yosemite 10.10.5 For Mac

Download a macOS installer, such as macOS Mojave or macOS High Sierra. To download macOS Mojave or High Sierra for this purpose, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. The OS X Yosemite installer – this should be ideally placed inside your Applications folder. DiskMaker X for your Mac – you can download it from here; Using Diskmaker. Once you have Diskmaker downloaded, connect your USB to your Mac and open up DiskMaker X.

Step 2: Open Disk Utility (located in your Applications Utilities folder). Step 3: Drag and drop the ' InstallESD.dmg' into the list of drives on the left and select it.

This should make it appear in the Source box on the right. If not, you may have to click the ' Restore' tab as seen below.

The last time Apple released a new version of its OS X operating system on physical media was 2009, in the case of OS X 10.6 Snow Leopard. Since then, new OS X versions are only available for download directly from the Mac App Store.

While this may be a convenient way to upgrade your Mac, it doesn’t leave you with a fallback solution as there is no bootable USB for you to do a clean install (in case your Mac gets corrupted). Keep the Installer From Being Deleted Automatically Similar to previous OS X versions, when you download Yosemite from the Mac App Store, it’ll automatically be downloaded to your Applications folder.

And if you leave it there, the installer will delete itself after Yosemite finishes installing on your Mac. So, if you plan to use the same installer file on different Macs in the future, or as in this case, you plan on creating a bootable drive, be sure to copy the installer to another location, such as an external drive, before you install Yosemite. Now there are two different methods to create a bootable USB drive for Yosemite. You can either use a simple graphical interface, or you can use OS X’s built-in Terminal utility. We’ve described both methods below. Before you get started, make sure you have the following stuff with you:.

Usb Installer Bootable Os X Yosemite 10.10.5 For Mac

An 8GB or larger USB drive or external hard drive (this can be a partition on a larger drive as well). The OS X Yosemite installer – this should be ideally placed inside your Applications folder. DiskMaker X for your Mac – you can download it from Using Diskmaker 1. Once you have Diskmaker downloaded, connect your USB to your Mac and open up DiskMaker X.

You’ll be presented with options to make installers for either OS X 10.8, 10.9 or 10.10. Click on OS X Yosemite (10.10). Diskmaker should automatically search your system for the OS X 10.10 Installer and should present the file with its location to you. If this is the right installer, click on “Use this copy.” If it doesn’t detect the installer, click on “Use Another Copy” to navigate to the installer you want to use. Once located, click on Done. Diskmaker will then ask you to select the drive you want to use as a Yosemite bootable drive.

Once you select it, it will proceed to format the drive/partition and create a bootable disk. Depending on your Mac and USB type, this process can take from two to thirty minutes. It took around sixteen minutes to create a bootable disk on my USB 2.0 drive on my iMac (Mid-2012). Once DiskMaker is finished, you’ll have a bootable Yosemite installation drive.

And that’s it! You can now use this bootable drive to easily install Yosemite onto multiple computers, or you can use it as a recovery drive for use in the future. Using Terminal If the above method didn’t work for you for some reason, you can easily create a bootable USB using Terminal.

Here’s how: 1. Connect your USB to your Mac, and open Disk Utility on your Mac. Select the drive from the left-hand pane and click on the Erase tab. Note: This step will erase all data on the USB/drive, so be sure to backup any valuable data you have on your drive.

Select “Mac OS Extended (Journaled)” from the Format menu, enter “Untitled” in the Name field and click on “Erase”. Make sure your Yosemite install file is located in the main Applications folder (/Applications) before proceeding.

Open Terminal on your OS X system using Spotlight or by navigating to “Applications - Utilities.” 5. Copy and paste the following command into Terminal and press Enter.