Mac Os X Dual Boot Windows 10



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Home > Resources > Dual Boot Windows 10 & macOS without Erasing Windows
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A dual boot Windows PC containing Windows 10 and macOS is not that hard to create. Fondly called a Hackintosh, such a setup allows you to enjoy the best of both operating systems on a single computer, hence the phrase dual boot. One of the biggest reasons that people want to create Hackintoshes is that they have the freedom to choose from two different desktop app sources. On a dual boot, you can enjoy popular Windows applications from the Microsoft Store as well as the best nuggets from the Mac App Store - all on a single computer.

Dual Boot Macos Catalina And Windows 10

The easiest way to do this is to get a Windows 10 PC and then partition the drive so you can install macOS on that partition. Each OS requires its own partition or its own drive. In this article, we'll show you how to create a partition and install the Mac operating system alongside the existing copy of Windows 10 on your PC.

Currently this tutorial is applied to macOS Mojave and High Serria, Mac OS X Serria, EI Capitan and Yosemite

Preparations before Making a Dual Bootable (Win 10 & macOS) PC

There are a few things to keep in mind at this point. First, you don't need a secondary drive to do this. The shared drive method of dual booting will work just fine as long as you have enough space on the disk for an additional partition for your copy of macOS.

The second requirement is that the disk needS to be already partitioned as GUID Partition Table, or GPT. Otherwise, you will need to first delete Windows, install macOS after formatting the disk, and then install Windows 10 at the end. The reason Windows 10 comes last is that certain errors might occur if you try installing Windows first.

P.S if the current OS is not Windows 10, then you have to create a bootable Windows 10 USB and install it on the computer first.

Third, you will need to create a macOS USB installer before attempting the dual boot. You can do this on a Mac by getting the installation files via the App Store and then burning the DMG file inside to a USB drive using Disk Utility app.

Dual Boot Windows 10 and Mac OS on PC without Erasing Windows

To start off, you will need a disk partition utility to help you allocate the required space. A free tool like MiniTool Partition Wizard Free Edition is more than adequate. Once you have the software, follow the steps shown below.

Step 1: Launch MiniTool Partition Wizard and look for the EFI system partition. If not EFI partion found, then create a new partition with GPT.

Step 2: If the EFI partition is less than 200MB, you will need to expand it by taking space from the partition before or after it. This is usually the case when the disk is formatted for Windows, which only allocates 100MB for the EFI partition. You can right-click on the partition to resize it.

Step 3: Now right-click on the new partition and select Split to create a new partition for the macOS installation. The size can be specified on this page. Click OK to apply the changes.

Step 4: The next step is to format this partition. To do this, right-click on the macOS partition and select Format. Set the file system to FAT32 and confirm by clicking OK.

Step 5: You will now need to boot your PC from the macOS USB installer. In Windows, you can do this by hitting the F2 during the startup process. This takes you to the BIOS Setup Utility, where you can change the boot priority so the computer boots from your macOS USB installer instead of the existing Windows files. Once the PC boots up from the installer, open Disk Utility from Applications >Utilities. Select the partition inside Disk Utility and hit Erase. Set the format to APFS (macOS High Serria and Mojave) or Mac OS Extended (journaled) for OS X 10.12 and below. After that, click the Erase button to start the partition process.

Step 6: The next thing is to merge the EFI folders from Windows EFI boot drive and the USB installer, and for this, you can use an EFI mounter like Clover Configurator. The purpose of this step is so that your macOS can boot from the partition instead of from the USB installer.

Mac Os X Dual Boot Windows 10 Iso

Step 7: Restart Windows 10 PC and boot from macOS install USB. Follow the prompt to start the macOS installation process.

Step 8: There's still one more step required to make sure the dual-booting works, and that is to modify one single file so that both partitions are visible as boot sources. This is important because, otherwise, you will have to boot to macOS from the installer each time, which is a complex and unnecessary task. The steps in the image below show you how it's done:

Step 9 : The final step, which is optional, will make your computer boot into Clover instead of Windows. This allows you to choose which OS to boot into, and it's a very convenient thing to set up. You can also do this when your drive name fails to show up despite following Step 6. See the steps shown in the image below.

The process is now complete. When you restart your PC, you will see two boot options in the Clover interface - one for Windows and one for macOS. Select the OS you want to work on and resume the boot process. You will need to restart to access the other OS, which is a minor inconvenience, but that's a trade-off you're going to have to be willing to make if you want a dual boot computer with both Windows 10 and macOS.

Another way is to use separate drives so each OS has its own drive and own EFI system partition. This can be done when your original Windows drive is not formatted for GPT. If it is, then you can follow the steps described in this article to do a dual-boot on a shared drive.

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Bootcamp (Boot Camp Assistant) is essentially Apple's way of welcoming Microsoft into its walled garden in a roundabout way. In other words, it allows you to install Windows on a Mac computer by partitioning the disk and letting you dual-boot a laptop or desktop. You will need to specify the amount of disk space for Windows installation, as well as get all the drivers required to run Windows on your Mac OS X or macOS computer. Once installed, it will be exactly the same as working in Windows. A lot of users prefer this over switching between Mac and PC, so you can imagine why Boot Camp Assistant has been so popular for so many years.

Part 1: Problems with Bootcamp Assistant on Mac

That being said, there are a lot of problems in using Bootcamp Assistant on latest macOS such as Mojave or High Serria. One of the errors is the 'Boot Camp installation failed' error. Apple suggests that you move to macOS Mojave and try installing Windows 10 again, but the issue doesn't always go away. Another common error is when trying to copy the Windows installation files. In still other cases, you'll notice that several Mac features don't work when running Windows, such as Apple Software Update stopping, no audio from built-in speakers, mic or webcam not recognized by Windows and so on.

To avoid such errors and issues, which can often take quite a lot of your time to figure out and fix, you can use alternative solutions to install Windows on a Mac from USB. Though you will still need to use Boot Camp Assistant for part of the process, but you're not likely to come across major installation errors when doing this. You can also use Terminal in Mac to help you install Windows. The next two sections describe these methods in detail.

Part 2: Make a Bootable Windows 10/8/7 USB Installer on Mac

Boot Camp Assistant is the official recommendation for creating bootable Windows USB. In case it does not work, we will suggest two alternative software in this section. Both are working fine on latest macOS and we tested three USB drives without running into any issue.

Method 1: Create Windows Bootable USB Using ISO Editor (without Bootcamp)


UUByte ISO Editor can work as a great alternative to Bootcamp for installing Windows OS on Mac. You can easily fetch all the required drivers using Bootcamp, but the installation process for putting Windows on your Mac is different from how Bootcamp does it. UUbyte is one of the most robust Windows 10 bootable USB creator for Mac that you'll ever find. It can do a lot more than just create bootable media, such as creating ISO files, editing them, copying from disc to ISO and so on. For this process, you will need to use the Burn module, which is explained below:

Step 1: Get the Windows 10 ISO from Microsoft's website and install the Mac version of UUbytes ISO Editor.

Step 2: Launch Boot Camp Assistant, go to Action and click on Download Windows Support Software. When the dialog appears, click Save and specify a location for the files.

Step 3: Open the UUbytes program and click on the module that says Burn. Insert a USB flash drive and burn ISO to USB drive. Select the ISO image and click on Burn. This will create a bootable USB drive for the Windows installation.

UUByte is the best alternative to BootCamp for creating bootable Windows USB installer. It is simple to use and has less errors.

Method 2: Create Windows Bootable USB Using Terminal App (without Bootcamp)


Dual boot windows 10 and mac os x high sierra

This method uses Terminal application to create the bootable media for Windows 10. You will still need Boot Camp Assistant for the support software, but if you're comfortable with command line work, you try this approach. You will first need to download the Windows 10 ISO file. You will also need to use Boot Camp Assistant to get the support files, for which you can follow Step 3 from Method 1.

Mac os x dual boot windows 10 isoMac Os X Dual Boot Windows 10

Step 1: Launch an instance of Terminal. Type the following command and then Enter to list out your drives:

diskutil list external

Step 2: Scroll down the name of the USB drive listed in Terminal. You will be using this in the next command. For now, let's call it disk2. The next step is to format your USB drive for Windows 10. Use the following command, then hit Enter:

Dual Boot Windows 10 And Macos Mojave

diskutil eraseDisk ExFat 'WINDOWS10' MBR disk2

Step 3: You will be able to see a mounted disk called Windows 10. Mount the downloaded Windows 10 ISO file by double-clicking it in Finder. The name will be CCCOMA_X64FRE_EN-US_DV9. You can also run the following command:

cp -rp /Volumes/CCCOMA_X64FRE_EN-US_DV9/* /Volumes/WINDOWS10/

Step 4: Unfortunately, there's no progress bar to indicate that the bootable media is being created. However, after a sufficient amount of time has passed, the USB drive will contain bootable media for a Windows 10 installation.

Part 3: Create a New Partition for Windows OS on Mac

Windows OS can be only installed on a FAT/ExFAT or NTFS partition. You have to create a new partition on Mac for storing Windows OS files as the default partition on Mac is HFS+ or APFS. This can be done with the help of built-in Disk Utility app. However, this is a highly risky task. Please backup your important data to iCloud or external drive with Time Machine.

To create a new partition for Windows OS, please open Disk Utility app on your Mac. Click the internal disk name on the left sidebar. Now, click the Partition tab on top menu. From the pop-up window, type a name for this new partition and select ExFAT for Windows 10 and MS-DOS (FAT) for Windows 7 from Format drop-down menu. At the end, set a size for the new partition. Finally, click Apply button to take this into effect.

Part 4: Boot Mac from Windows Installation USB

Mac will boot from internal hard drive or SSD in default. To install Windows OS on Mac without Boot Camp, you should let your Mac booting from USB drive to start the installation process. However, this is an easy task.

Make sure you disconnect all USB devices except a wired keyboard and the USB drive containing the Windows ISO files. Now restart your computer and hold down the Option (Alt) key at the same time. Wait for about 10 seconds, Apple logo shows up and you will be presented with several boot options. Pick up the drive you have set in Part 2. If you did not do that, the default name is EFI Boot.

Part 5: Start Installing Windows 10/8/7 on Mac without Bootcamp

Dual Boot Windows 10 Mac Os X El Capitan

When Mac boots from the bootable Windows 10 USB, wait about 30 seconds and Windows installation wizard appears. At this time, the window is much small because graphics driver are not installed yet. Now, you have to follow the screen prompt to choose language, region and most importantly the partition to install Windows OS files.

Part 6: Download and Install Windows Support Software (Drivers)

The Windows ISO image file only has the basic drivers for running Windows OS. Some of the hardware on Mac won't work in Windows, suchas Apple Mouse, trackpad or speaker. You have to install addition drivers to use Windows seamlessly as it is on a PC. To do this, you should download and install Windows Support Software with the help of Boot Camp Assistant.

As usual, launch Boot Camp Assistant app on your Mac and click Action tab on menu bar, where you can see an option named Download Windows Support Software. Now, choose your Windows Installer USB as the target location to store the driver files. It will take 5-10 minutes for the downloading task.

Now, boot your Mac into Windows partition. You will see a pop-up from Boot Camp installer. Just follow the prompt to install Windows Support Software. If it does not appear, then plug the USB drive and navigate to USB drive in File Explorer; then go to WindowsSupport -> BootCamp, and click setup.exe to start installing Windows drivers for this Mac.

Part 7: How to Switch Between Windows and macOS

Now, you have everything set up properly for both Windows and macOS. You may be wondering how can you switch OS between Windows and macOS? The trick is a bit different depending on which OS you are currentlt in.

If you are in macOS now and want to restart into Windows, then reboot your Mac and hold Option key untill you see the Startup Manager, where you can choose a booting device like we mentioned in Part 4, something like this:

You can also do this in Startup Disk from System Preferences. Choose th Windows partition and click Restart... button to boot Mac into Windows OS.

If you are in Windows OS and want to switch to Mac, click the Up Carat icon and select Restart in macOS. If this option does not show up, then reboot Windows as normal and press Option key to bring up Startup Manager and pick up Macintosh HD this time.

Conclusion

It is absolutely not an easy journey for installing Windows on Mac without BootCamp. Fortunately, we have put everything together to help you complete this task smoothly. The key part is how to partition the Mac internal drive and create bootable Windows USB. If you are not comfortable using Terminal, UUByte ISO Editor is the recommended way to install Windows on a Mac without Boot Camp Assistant. It's reliable, quick and doesn't require any special technical knowledge.