Here is how you create a Windows 10 install USB drive from OS X.This can be use to make USB installer that will work on. In the new command line window that opens, to determine the USB flash drive number or drive letter, at the command prompt, type list disk, and then click ENTER.Let’s say that your computer that runs Windows has died in such a way that you have to re-install Windows and you don’t have the installation drive for it? AND that the only computer you have access to in order to create such and installation drive is an Apple / OS X machine? This is what happened to me recently. Open a Command Prompt window as an administrator. Insert a USB flash drive into a running computer. To create a bootable USB flash drive.On my MacBook Air What HappendGrab a USB drive (With at least 16GB of Space) and make it bootable. UPDATE — I had to use Windows to do it. Run the command 'diskutil eraseDisk MS-DOS 'WINDOWS10' GPT'.Note: Here are the parts I chose for the build that this Windows 10 installer USB stick will be used for. Key in 'diskutil list' and press 'Enter' key to see the list of connected drives and findyour USB drive's name. After connecting the USB drive to your Mac system, open Terminal.
![]() Make A Bootable Usb On A Windows Install USB Drive![]() ![]() The comparison between these two versions from Microsoft can be seen here. There are two main versions of Windows 10: Home and Pro. If you have a way that has worked for you, please let me know so that I can update this post! Buying Windows 10 — Picking a versionThe first step in creating install media for Windows 10 is, of course, to buy a version of Windows 10. The great folks at Puget Systems, however, have run some tests and shown that the version doesn’t really matter for sake of pure performance. There has been some debate that, when using a very high core count CPU like the 64 core / 128 thread Threadripper 3990x (affiliate link to Amazon), there is a need to use Windows 10 Pro for Workstations. More Versions of Windows Skip If You Chose Home or ProThere are more versions of Windows 10 called Windows 10 Pro for Workstations and Windows 10 Enterprise. Clicking the “Redeem now” link will take you to a page that will let you download the Windows install media. Download the Windows Install MediaOnce you’ve purchase your chosen version of Windows you’ll get a page from Microsoft’s website that allows you to redeem your purchase. Given that I bought the 24 core / 48 thread Threadripper 3960x (also an affiliate link) which, while it has lots of cores, has less than those in the tests by Puget Systems I decided to go with Windows 10 Pro. While this may seem scary to you don’t worry! This will only take a few easy commands and this guide will walk you through it. Creating The Install USB DriveIn this guide we’ll be using the command line in OS X to create the install drive. If you didn’t just purchase Windows you can find the install media here. Most modern computers will be able to use the 64-bit version of Windows. In the search bar that comes up type “Terminal” and press enterThis will result in a screen that looks something like the following:With this screen up we’re going to use the command diskutil list to determine where OS X “mounted” the drive. Hold the command key (⌘) and press space or click the search button in the upper right of the screen Given that 16 GB drives are on sale, at the time of writing this, for $5 on Amazon (affiliate link) drives that are big enough can be easily found.Once you’ve plugged in the USB drive start up the terminal. First Step — Plug in a USB drive and figure out where it is mountedGiven that the installation media for Windows is a little more than 5 GB you’ll need a USB drive bigger than that. Thanks to this article on freeCodeCamp by Quincy Larson for these steps. Copy the /dev/disk text for the drive you find. Look for the one that is listed as both external and physical and that matches roughly the size of USB drive that you plugged in. Type in diskutil list and you’ll see something like the following:There will be several sections that all start with /dev/disk. We’ll do this by using the hdiutil command with the mount option. Third Step — Mount the Windows 10 Install Media so it can be copied to the USB driveAs mentioned before “mounting” is the process of having OS X make a hard drive or, as in this case, a file that contains the contents we want on a hard drive available to be used. When it’s done you’ll see something like the following:If you’re curious about the technical details about how we formatted the USB stick, we used the FAT32 format (specified by the MS-DOS option) and a Guid Partition Table (specified by the GPT option). We’ll tell it to format the disk in a way that Windows can read by running the following command:Diskutil eraseDisk MS-DOS "WIN10" GPT /dev/disk2This shouldn’t take too long. Second Step — Erase the disk and make it useable by WindowsTo do this we’re going to use the diskutil command again but with different options. Given this little issue we’ll have to do this copy in a couple steps. Namely the install.wim file. A limitation of the FAT32 drive format is that it cannot hold files larger than 4 GB and the Windows installer now has a file larger than that. In my case they the folder /Volumes/CCCOMA_X64FRE_EN-US_DV9 as seen below: Fourth Step — Copy the files over to the USB driveWhile this may seem like a simple drag and drop copy this we actually need to do something a little special. Run the following command to mount this file for use:Hdiutil mount ~/Downloads/Win10_2004_English_x64.isoOnce this has run hdiutil will tell you where it put the files. If will likely be named something like Win10_2004_English_x64.iso and be located in your Downloads folder. Step 2 — Install Homebrew if you don’t have itContinue to step 3 if you’ve already got Homebrew installed. As the copy starts you’ll see the files flash by as they’re moved over to the drive. If it does, click ok so that the copy can continue. We’ll use it to split up the install.wim file so that we can copy it to the USB drive. This is because wimlib is a set of functionality to deal with wim files. Step 3 — Use Homebrew to install wimlibYou’ll notice the similarity between the name of the file we couldn’t copy earlier (install.wim) and what we’re going to install (wimlib). Snes emulator mac redditTo do this type the following and press enter:Wimlib-imagex split /Volumes/CCCOMA_X64FRE_EN-US_DV9/sources/install. Type the following and press enter:Mkdir /Volumes/WIN10/sources Step 5 — Use wimlib-imagex to split up install.wim and save it to the USB driveWe’ll use part of the newly installed wimlib to handle both splitting up the install.wim file and saving it to the USB drive.
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