Boot Camp ‘bootable USB drive could not be created’ and ‘EFI system partition formatted as NTFS’. I did a fresh macOS install and wanted to install Windows 10 back but Boot Camp is asking for a USB drive. High Sierra wasn't asking for it as a Windows 10 ISO file was enough. Installing Windows 10 from Boot Camp Assistant Once the bootable installation USB drive has been created for a multi-drive Mac, quit Boot Camp Assistant, then launch it again. This time, check the last box — “Install or remove Windows 7 or later version” — then click Next.
What you need to install Windows 10 on Mac
Aug 03, 2011 The latest Snow Leopard has added support for formatting partitions in exFAT with Disk Utility. Will Boot Camp Assistant force me to format in NTFS, or can I just install into an exFAT partition without formatting first? I've never used Boot Camp Assistant before and I'm a little uncertain about how this will work out. Sep 12, 2011 I set the Bootcamp drive size to 35 GB, which is supposed to be enough space for NTFS but not FAT32. Still, I need to 'convert' the Bootcamp drive to NTFS somehow. On the Mac side, I have a Mac Pro with Snow Leopard. Thanks for any tips on how to convert the Bootcamp drive to NTFS.
The latest macOS updates, which can include updates to Boot Camp Assistant. You will use Boot Camp Assistant to install Windows 10.
64GB or more free storage space on your Mac startup disk:
An external USB flash drive with a storage capacity of 16GB or more, unless you're using a Mac that doesn't need a flash drive to install Windows.
A 64-bit version of Windows 10 Home or Windows 10 Pro on a disk image (ISO) or other installation media. If installing Windows on your Mac for the first time, this must be a full version of Windows, not an upgrade.
How to install Windows 10 on Mac
To install Windows, use Boot Camp Assistant, which is included with your Mac.
1. Use Boot Camp Assistant to create a Windows partition
Open Boot Camp Assistant, which is in the Utilities folder of your Applications folder. Then follow the onscreen instructions.
2. Format the Windows (BOOTCAMP) partition
When Boot Camp Assistant finishes, your Mac restarts to the Windows installer. If the installer asks where to install Windows, select the BOOTCAMP partition and click Format. In most cases, the installer selects and formats the BOOTCAMP partition automatically.
3. Install Windows
Unplug any external devices that aren't necessary during installation. Then click Next and follow the onscreen instructions to begin installing Windows.
4. Use the Boot Camp installer in Windows
After Windows installation completes, your Mac starts up in Windows and opens a ”Welcome to the Boot Camp installer” window. Follow the onscreen instructions to install Boot Camp and Windows support software (drivers). You will be asked to restart when done.
How to switch between Windows and macOS
Restart, then press and hold the Option (or Alt) ⌥ key during startup to switch between Windows and macOS.
Learn more
If you have one of these Mac models using OS X El Capitan 10.11 or later, you don't need a USB flash drive to install Windows:
Write Ntfs Mac
To remove Windows from your Mac, use Boot Camp Assistant, not any other utility.
For more information about using Windows on your Mac, open Boot Camp Assistant and click the Open Boot Camp Help button.
1. If you're using an iMac (Retina 5K, 27-inch, Late 2014) or iMac (27-inch, Late 2013) or iMac (27-inch, Late 2012) with a 3TB hard drive and macOS Mojave or later, learn about an alert you might see during installation.
2. For example, if your Mac has 128GB of memory, its startup disk must have at least 128GB of storage space available for Windows. To see how much memory your Mac has, choose Apple menu > About This Mac. To see how much storage space is available, click the Storage tab in the same window.
3. These Mac models were offered with 128GB hard drives as an option. Apple recommends 256GB or larger hard drives so that you can create a Boot Camp partition of at least 128GB.
With a growing number of companies allowing employees to “BYOD” (Bring Your Own Device), more and more people are buying Macs. Some of those same companies require their employees to also be able to run Windows on their Macs. There are virtual machines that can run on Macs such as Parallels Desktop, but in my experience none run quite like “real” PCs, even on fast Macs. Fortunately, Apple has long supported a way of running Windows in a partition on a Mac, creating a dual-boot computer that can run both Mac OS X and Windows. In this Tech Tip, I’ll show you how to install Windows 10 on a Mac using Boot Camp.
Remember, you might not need to install Windows on your Mac in order to run compatible applications. Microsoft Office was often cited as an excuse why companies needed to have employees use Windows, and the newest Mac versions are surprisingly similar to those on Windows. However, if you need apps such as Microsoft Access or proprietary apps that don’t have Mac equivalents, Boot Camp is the most compatible and speedy way to run those apps.
What You’ll Need
Making an install USB disk for a multi-drive Mac
Heeding Apple’s advice, I used Boot Camp Assistant on a Mac running OS X El Capitan to create a USB flash drive Windows Installer disk. To do this, I first downloaded a Windows 10 ISO disk image from this Microsoft web page into the Download folder. Boot Camp Assistant can be found in the Applications > Utilities folder. Once launched, the app displays a screen with three options:
Next, I launched Boot Camp Assistant, checked the first two options — “Create a Windows 7 or later version install disk” and “Download the latest Windows support software from Apple”, then clicked Continue. The next screen (see screenshot below) has you select the location of the Windows ISO image and the USB flash drive as the destination to create a bootable USB drive for Windows installation, and then click continue. The process of moving the Windows files from the ISO image file to the USB drive and downloading the necessary support files and saving them to the installer drive can take a while.
Creating a bootable installation USB drive using Boot Camp Assistant
Installing Windows on a Single-Drive Mac
If you’re installing Windows on a Mac with a single drive, things are much easier. Just download the ISO image, launch Boot Camp Assistant, and you’re greeted with the following window:
Select the location of the ISO image (probably in the Downloads folder), choose a partition size for Windows by moving the slider between OS X and Windows left or right, and click the Install button. You may still be asked to download the Windows support software from Apple on another screen before the installation proceeds.
Installing Windows 10 from Boot Camp Assistant
Once the bootable installation USB drive has been created for a multi-drive Mac, quit Boot Camp Assistant, then launch it again. This time, check the last box — “Install or remove Windows 7 or later version” — then click Next. Note that you should not need to perform this task on a single-drive Mac.
Your Mac restarts, and you’ll see a very DOS-like message telling you that the machine has booted from the Boot Camp-created USB drive if that’s what you’re using. Soon the screen will turn purple, and show a message that says “Setup is starting”. Select the language, time and currency format, and keyboard type, then click Next.
You’ll be asked to activate Windows (see image below). With your licensed copy of Windows you’ll have a card or sticker with a 25-character product key code. Type it in, then click Next.
Enter the product key to activate Windows
A screen appears asking what operating system you wish to install (see image below). In my case, it was the 64-bit (x64) version of Windows 10 Home that I had purchased, so I selected it and clicked Next. You’ll need to accept the license terms by checking a box on the next screen, and then you can click Next one more time.
The next window asks where you wish to install Windows, and shows a list of drives and partitions. Boot Camp will have created a partition that is labeled BOOTCAMP. Select it, and then click the Format button below the list. This formats the drive in the Windows NTFS format, making it ready for the Windows installation. Finally, click Next one more time. Note that these steps may be bypassed when installing Windows into a partition on a single-drive Mac.
Selecting the BOOTCAMP partition in which to install Windows 10
Boot Camp Mac Must Be Formatted As Ntfs Drive
This begins the installation of Windows, copying files, installing features and updates, and then finishing up. As with the creation of the bootable USB drive, this can take a while. Eventually your Mac will reboot into Windows 10, showing that it is “Getting devices ready”, then rebooting again. At this point, your Mac is a Windows PC, and will go through the process of setting itself up to use the Cortana intelligent assistant, asking you your name and password, and so on. Finally, Boot Camp runs itself on the Windows PC (see image below). Just click Next, accept the terms of the Apple license agreement, then click Next one more time.
If you have any other third-party devices to install, be sure to download and install the necessary Windows drivers for those after Windows is up and running on your Mac. You’ll also want to make sure that Windows Defender is set up, that you check for and install recent Windows updates, and install any apps you’re going to use on your Windows device.
Switching Between Mac and Windows
Once everything is up and running, it’s a quick process to switch between your “two computers”. When your computer is running OS X and you wish to run Windows, just restart while holding down the Option key (Alt key on a Windows keyboard). After a few seconds, the available boot drives appear. In my case, there was one for El Capitan, one for Windows, and the OS X Recovery Partition. Use the arrow keys to highlight the Windows drive, press Return/Enter, and the Mac boots into Windows. Boot Camp Mac Must Be Formatted As Ntfs File
Likewise, if you’re running Windows and want to get back to the sanity of OS X, choose Restart from the Apple menu, and hold down the Option/Alt key on the keyboard. Select the OS X drive and press Return or Enter on the keyboard, and OS X is loaded.
How long does it take to switch from OS X to Windows 10? I timed it on a Late 2012 Mac mini Server, from selecting Restart to time I first saw the Windows login screen, and it took 1 minute and 39 seconds. Going from Windows 10 back to OS X? Just 58 seconds.
If you absolutely need to have Windows and OS X running simultaneously so that you can cut and paste between the operating systems, then I highly recommend one of the virtual machine environments described at the beginning of this post.
Using Ntfs On Mac
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