#Mac os dmg usb download#
OS X is a multi-gigabyte file so the download process may take a while depending on your connection speed. Find your desired version of OS X in the list and click the “Download” button to the right.
If you’ve already purchased OS X, open the Mac App Store and head over to the “Purchases” tab. Note that you can always re-download the version of OS X that came with your Mac for free.Īs of the date of this article, OS X 10.8 Mountain Lion is the current OS, although the recently-announced OS X 10.9 Mavericks is right around the corner.
#Mac os dmg usb how to#
Here’s how to create your own USB or DVD Installer for OS X.įirst, you’ll have to purchase a copy of OS X from the Mac App Store if you don’t already have one. This approach brought many benefits, such as not having to keep and safeguard a physical disc, immediate access to the OS when purchased instead of having to wait in line, and server-side updates to the downloadable installer so that the most current version of OS X is always installed when updating new machines.īut what if you’ve just installed a new hard drive in your Mac and have no version of OS X with the Mac App Store? Or what if you don’t have a reliable Internet connection? In these cases, it’s always best to have a physical local copy of the OS X installer. Instead of a traditional disc, customers could now purchase and download OS X directly from the Mac App Store. With the release of OS X 10.7 Lion in 2011, Apple officially abandoned physical media for its operating system installations. For OS X Mavericks, see this updated process. In fact, you have a couple of ways to do this: either using Disk Utility to format the drive before installing macOS or cloning your drive using a third-party tool.UPDATE: Apple has changed the process for creating a USB installer with OS X Mavericks and the method below no longer works.
#Mac os dmg usb install#
macOS users can also install the OS onto a USB drive and work with the same installation that’s on your internal (and faster) drive. Linux users know that booting from a USB drive is a useful way to get into the OS. In short, we don’t recommend it, and it’s likely not supported. We also don’t know whether you’ll experience issues if you look to install an older OS you don’t own. Though, if your Mac is based on Apple Silicon, you may find incompatibilities. In theory, there’s no reason why you couldn’t boot an older version of macOS, and Apple does offer ways to install older versions on a USB. Can I boot older versions of macOS from a USB drive? Our testing gave us no issues when using a USB 2.0 to USB-C connector, so you’re able to press your older USB drives into service. Am I able to use a USB connection other than USB-C?
We recommend 16GB to give yourself enough “wiggle room” when it comes to the installation process. As such, you’ll need a large enough USB drive to store Big Sur. In our experience, you will not be able to do this. Can I split an installation across multiple USB drives? Disk operations on the boot drive can be performed safely from a USB stick as well.
You can now run the operating system as normal and use this USB drive to boot up your Mac. For Intel Macs, restart and hold the Option key to enter into the boot selection dialog.įor both types of machines, use your keyboard’s arrow keys to select the USB drive from the list of bootable devices, click to confirm, and your USB drive will begin to boot.
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