If you want to experience Windows 10 on your Mac, you can now easily create a Windows 10 bootable USB to install on your Mac. For Microsoft users, they can easily create a bootable USB on Windows with the help of a useful tool.
In this tutorial we look at a few ways of creating a bootable Windows 10 USB flash drive from an ISO image. Creation of a bootable USB from an Ubuntu Linux 15.10 Desktop ISO is also discussed for comparison. These techniques can be used to create bootable flash drives for many other operating systems.
If you want to install an operating system (OS) on your computer, you can download an with that OS. A Windows 10 ISO is available from Microsoft at. If your computer has a DVD drive and DVD burning software, you can just burn the ISO to a DVD and use that to boot your computer. However, many of today’s computers don’t have a DVD drive, but do have a USB one. Creating a bootable USB flash drive is not as straightforward as burning a DVD. We look at three of the possible approaches for doing this on a computer running Mac OS X.
Disclaimer: use the information found in this tutorial at your own risk. Please be careful! It is very easy to ruin your Mac’s operating system if you make a mistake, especially when using the command line! Method 1: Create Bootable Windows 10 USB With Disk Utility This may be the easiest way of creating a bootable windows 10 USB from an ISO image in Mac OS X. Unlike the other two methods, this one does not require administrative privileges. Unfortunately, this will not work for Ubuntu: the ISO for Ubuntu 15 Desktop contains a Linux-specific file system that cannot be read by Mac OS X without installing additional software. Here are the steps:.
After inserting the USB flash drive, open the Disk Utility found in the Utilities folder under Applications. In this example I use a 32 GB SanDisk Cruzer and create a 5 GB partition on it, called WIN10TEST. Set up USB with MBR partition scheme. Mount the Windows 10 ISO by selecting File - Open Disk Image in the Disk Utility. Please make a note of the volume name by which the mounted ISO image is seen in the Finder. It will probably be a long sequence of letters, numbers, underscores, and dashes.
For the purposes of this tutorial we will assume that the USB volume is named WIN10TEST, and the ISO is mounted as volume ISOWIN10. Using the Finder, copy all files and folders from ISOWIN10 to WIN10TEST. If you encounter an error, you can use the following command in the Terminal to copy the ISO contents to the USB drive: cp -R /Volumes/ISOWIN10/ /Volumes/WIN10TEST Please don’t forget the slash (/) after ISOWIN10!!! Before running the above command, you may want to make sure that the directories exist.
If the first one doesn’t, then the ISO may have been incorrectly mounted. If the second one is missing, then maybe the USB drive was named something else or needs to be taken out and re-inserted. After running the command please make sure that the content of ISOWIN10 is now also found in WIN10TEST. See this post about an error that can occur while copying the ISO contents to a USB flash drive: Congratulations! You now have a bootable Windows 10 USB that you can use as installation media for a PC.
Not sure if you can use it for installation on your Mac, though. BTW, if you tried this with the Ubuntu 15 Desktop ISO, an attempt to mount the ISO using the Disk Utility would have resulted in the following error message.
Error mounting Ubuntu 15 ISO As mentioned earlier, this is because that ISO contains a file system that can’t be read by Mac OS X. Method 2: Create Bootable Windows 10 USB Using UNetbootin Software This method can also be used to create an Ubuntu bootable USB. Here we use a piece of software called, which is available for multiple platforms, including Mac OS X. The steps are:. Download UNetbootin from its official site,. Make sure you allow your computer to run apps downloaded from anywhere.
This can be done in System Preferences under Security & Privacy. You may want to revert to a more restrictive setting after making your bootable USB. Run the UNetbootin app as described on its website mentioned above. Overall, the tool is fairly intuitive. It’s primarily intended for creating installation USB media for various Linux distributions, but it also has an option to select an ISO file on your computer and make a bootable USB from it. As it turns out, it works just fine with more than Linux, it can be used to create Windows installation media as well.
Use the dd Command. Works only with Ubuntu ISO If you are comfortable using Mac OS X command line (a.k.a. Terminal), you can do the following. You will need to be logged in as the root user for this to work.
If you are logged in as a regular user with admin privileges, you can become root by executing sudo -i You will be prompted for your password. This method works only with a Ubuntu ISO, at least with the Ubuntu 15.10 Desktop ISO tested here.
That’s because the Ubuntu ISO is a hybrid ISO, which can be used to burn a bootable DVD or can be copied, bit by bit, to a USB flash drive to make that drive bootable. You can read more about this type of image, for example, at.
So, here are the steps:. Run diskutil list before inserting a USB flash drive and take note of the listing. Insert a USB drive. Run diskutil list again and make a note of the disk number corresponding to the USB stick. E.g., if /dev/disk2 shows up, which was not there during the first run, then /dev/disk2 is the USB drive.
It is very important to know the correct disk number!!!. Unmound the USB by running diskutil unmountDisk /dev/diskN where N is the disk number corresponding to the USB. Run the following: dd if=/path/to/the/iso of=/dev/rdiskN bs=4m Please substitute the path to the Ubuntu ISO and the USB disk number in the above command. Please note the r before disk (it’s rdiskN, not diskN). You don’t have to use bs=4m, but that makes the process much, much faster, as it reads and writes in 4 MB chunks You could also try other numbers; I successfully used 1m. As a side note, a bootable Windows 10 USB created using method 1 or 2 will only be usable for a UEFI boot. It won’t work for legacy boot.
For this reason we did not care to make the partition bootable in method 1. This entry was posted in. Bookmark the.
How to make a bootable USB thumb drive in Mac OSX from an ISO file An ISO file or image is an archive file containing the exact contents of an optical disc such as a CD or DVD. It includes the entire disc’s contents including the file system. I’ve previously discussed files on your Mac. A DMG is similar to an ISO in that it’s a mountable image.
Usually ISOs are used to distribute CD images such as distributions of operating systems such as Linux. If you would really like to learn more about ISO files you can view this comprehensive.
ISOs are not however limited to such uses and software is available to create your own ISO archives with just about anything on them. One of the main advantages of an ISO is that because you are creating an entire image of a CD it takes everything with it including that CD’s ability to boot for example. So if you normally boot from a CD such as your Windows XP CD or a Linux live CD then you can theoretically create an ISO image of these CDs and with the instructions below you can create a bootable USB thumb drive also which can be very handy in today’s netbook world.
Creating an ISO from a CD You probably already have an ISO that you’d like to make a bootable thumb drive from but if you don’t, it’s quite easy to make one from a bootable CD on your Mac. Insert the CD. Open Disk Utility. In the left pane, highlight your CD/DVD drive. On the toolbar, click New Image.
In the dialog box. In the Save As field enter a filename for your image.
In the Image Format field, select CD/DVD master. In the Compression field, select none. Click Save. After about 10 – 20 minutes, the creation process will be complete. You will notice however that the file name ends with.cdr but you can change this to.iso by simply renaming the file. Creating the bootable USB thumb drive It is technically possible to create the bootable thumb drive using Disk Utility but for this I will show you how to do it the more reliable way (in my opinion anyway, but hey that’s why you’re here) using Terminal. Plug in your USB drive and wait for it to mount.
Make sure the capacity of the USB drive at least 1GB. We will be erasing the contents of the USB drive during this process so now is a good time to go ahead and copy anything you need off the USB drive. Open Terminal. Type the following and press enter: diskutil list. You will see a table of data.
This is a table of all the disks and volumes on your Mac. Look for the disk path for your usb drive. It will look something like /dev/diskx where x is the disk number.
I’m pretty sure it won’t be zero as that’s usually your hard disk. In my case it’s /dev/disk2. Type the following and press enter: diskutil unmountDisk /dev/diskX (change X to the disk number of your USB drive). OK for this next step I’ll teach you a quick and dirty trick. You must replace the letters YOURISOFILE with the path of the actual ISO you created in the previous section.
Instead of finding the path and typing it into Terminal simply do the following:. Type: dd if=. Now drag your ISO file from your Mac’s Finder or Desktop or where ever you saved it and drop it on the Terminal window – no, I’m not crazy. You’ll notice when you drop the file that the path of your ISO will be inserted nicely after the dd if= that you just typed. Now finish typing the command: of=/dev/diskX bs=1m.
So the whole command you need to enter is: dd if= YOURISOFILE of=/dev/diskX bs=1m. Remember to replace YOURISOFILE and diskX with your own values!!
Press Enter and wait – mine took 71 minutes to complete. When the process is finished you are returned to the Terminal prompt and hopefully you will have a bootable USB thumb drive. Hi, this is michael from, and I have a question related to your above directions. I am running these commands on Mac OS X version 10.8.3 system, and I don’t know if these commands are still valid. See the terminal code posted below. Michael $ diskutil unmountdisk /dev/disk1 Unmount of all volumes on disk1 was successful michael $ dd if= iso.iso of= /dev/disk1 dd: no value specified for if note: the iso file i’m using is in /user/michael/desktop/isos/ and i’m in this directory already. Thanks for any help.
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