![how to create a bootable usb os x yosemite how to create a bootable usb os x yosemite](https://www.technobuzz.net/wp-content/uploads/2014/06/Make-OS-X-Yosemite-Bootable-USB.jpg)
- #HOW TO CREATE A BOOTABLE USB OS X YOSEMITE MAC OS X#
- #HOW TO CREATE A BOOTABLE USB OS X YOSEMITE INSTALL#
- #HOW TO CREATE A BOOTABLE USB OS X YOSEMITE UPDATE#
#HOW TO CREATE A BOOTABLE USB OS X YOSEMITE MAC OS X#
I needed to upgrade my sister’s 2008 Macbook Pro and found that the existing Mac OS X 10.6 Snow Leopard did not support the “createinstallmedia” tool I got a “Failed to start erase of disk due to error (-9999, 0)” error.
#HOW TO CREATE A BOOTABLE USB OS X YOSEMITE UPDATE#
Update 2: The instructions below will work to manually create a Mac OS X 10.11 El Capitan USB installation drive.
#HOW TO CREATE A BOOTABLE USB OS X YOSEMITE INSTALL#
Update: Go to Install macOS Sierra Using Bootable USB Flash Drive if you want to install macOS 10.12 Sierra instead. Download the Yosemite installer from the Mac App Store and make sure it’s in your main Applications folder (/Applications)-it’s called Install OS X Yosemite.app. Download create-bootable-installer-for-os-x-el-capitan.sh to the USB drive Boot into Recovery Mode Insert the USB drive. That’s done with the “Erase” tab:Īs you can see, you’ll want to choose “Mac OS Extended (Journaled)” and click “Erase…” when you’re ready.How to create a bootable OS X Yosemite drive! You can perform clean installations easily and install this version of OS X on other Macs! Sudo Command: sudo /. If it’s not - and most USB flash drives are formatted for Windows, not Mac - then you need to reformat the drive. That’s the “after” picture because what the Yosemite installer is looking for is the Partition Map Scheme (lower right). Then look at the very bottom of the window where it shows all the data about the drive:
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Launch Disk Utility and choose the Kingston HyperX flash drive (or whatever other external drive you’re trying to use). That’s not good.įortunately, clicking on it reveals the problem:įind your “Utilities” folder in the “Applications” folder, and identify Disk Utility:
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The HyperX flashdrive is plugged in so I’ll click on “Show All Disks…” to choose it:īut, hmmm, it’s greyed out, indicating it’s not a selectable option. “BigHD” is my main drive on my MacBook Pro. Given your question, I’m going to assume you’ve already downloaded the disk image (“.dmg”) for the Yosemite installer. And that’s what this article covers.įor this task, I’m using a lovely Kingston 64GB HyperX external USB 3.0 flash drive (about $85 on Amazon). The other problem with using an external drive is making sure that it’s formatted correctly. How many of your USB drives are that big? Of course, you can use an external hard drive too, and the process is similar, so that’s not a complete show-stopper. General rule of thumb for a modern operating system install is to have at least 30GB of space. There are two problems with this strategy, however: First is size. Boot up into Yosemite to play, experiment and test, then go back to the stable, shipping Mavericks for your production work. So yes, installing the OS on an external drive or second partition or similar is very smart. There’s also going to be all sorts of extra system logging for debugging purposes so performance isn’t going to be as snappy as people would prefer and there are issues of upgrading mailbox formats, bookmarks, preferences, etc, just to find out that if you need to back up to 10.9 Mavericks, well, you’re in a big jam. With a public beta, it’s inevitable that people are going to leap onto the bandwagon so they can have a preview of Mac OS X 10.10 “Yosemite”, just to find that there’s a reason that “beta” is in the name at this point and have things fail to work properly or even at all.