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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.
![Boot for macos Boot for macos](/uploads/1/2/6/2/126273373/982576445.jpg)
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.
Boot For Macos
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.
Mac Dual Boot Keys
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.
Windows Boot For Mac
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.
Boot Mac From Usb
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![Dual boot for mac Dual boot for mac](/uploads/1/2/6/2/126273373/255659975.jpg)
Every operating system can crash at one time or another. While it's safe to say that macOS is more stable than Windows, it can still be affected by issues that prevent your computer from booting up. In such cases, you might need to boot your Mac from a USB flash drive to fix the problem. This article shows you two ways to boot Mac from external USB stick, as well as some troubleshooting tips in case Mac won't boot from the target USB.
Boot Mac from USB Option l: Startup Manager
If your Mac won't boot up normally, you can set it to boot from a different drive, such as a USB stick containing macOS installation files in bootable format. The drive will have to contain a version of the OS that is compatible with the Mac. As long as you have the bootable installation USB, you can start your Mac from the USB by accessing the Startup Manager. Here are the steps to be followed:
Step 1: Insert the bootable USB into Mac and power it on.
Send personal documents to your Kindle from your Mac.- Drag and drop one or more documents on to the Send to Kindle icon in your Dock or launch the application and drag and drop one or more documents on to it.- From any Mac application that can print, select the print menu and choose Send to Kindle.- From Finder, simply control-click on one or more documents and choose Send to Kindle.- Choose to archive documents in your Kindle library, where you can re-download them conveniently at any time. Sent to kindle for mac. Send personal documents to your Kindle from your Mac.- Drag and drop one or more documents on to the Send to Kindle icon in your Dock or launch the application and drag and drop one or more documents on to it.- From any Mac application that can print, select the print menu and choose Send to Kindle.- From Finder, simply control-click on one or more documents and choose Send to Kindle.- Choose to archive documents in your Kindle library, where you can re-download them conveniently at any time.
Step 2: As soon as the startup process begins, hold down the Option (alt) key and keep it depressed until you see the Startup Manager on your screen. If there is a firmware password on your Mac, hold down the Option key until you're asked to enter that password.
Step 3: You will now see the various startup disk options, and your USB will be listed there. If you click on the Up arrow right below the icon for the USB, the computer will only startup once using this disk. If you press and hold down the Control key while making your selection, it will be saved, and your computer will boot from the USB every time, as long as it is left in the computer.
At this point, you can also use the Mac installation disk to boot your Mac from. It will appear as EFI Boot, and it works on all computers running macOS 10.9 or higher.
Boot Mac from USB Option 2: Safe Mode/Recovery Mode
As an alternative, you can start your Mac in Safe Mode (Recovery Mode). This will allow the system to automatically detect and repair directory issues. Safe Mode will only allow required kernel extensions to load, preventing login items and startup items to load automatically. It can also help you isolate the issue depending on whether or not the issue goes away in Safe Mode. If the issues you have during normal startup don't show up in safe mode, they are most likely fixed. That means you can reboot normally and your system should be back to normal.
Step 1: Start your Mac and hold down the Shift key. You will see the Apple logo on your screen.
Step 2: When you see the login screen, you can release the Shift key and login to your Mac.
Step 3: To check whether your Mac has booted into Safe Mode, click on the Apple logo on the top left and then on About this Mac. In the window that opens, click on System Report… You should be able to see this:
How to Fix Mac Won't Boot from USB Drive
Sometimes Mac won't boot from USB as expected. If you are unable to select a different startup disk, it's possible that your disk is not showing up in Startup Manager. If you try Method 1 above but don't see your USB drive listed there, it could mean one of the following problems:
Compatibility: It is possible that the version of macOS or Mac OS X that you have on the USB drive is not compatible with the hardware. That means you won't be able to see it in the Startup Manager so, of course, you won't be able to boot from it. In such cases, you may need to burn a compatible macOS version on USB drive in order to be able to boot Mac from it.
Startup Security Utility: In certain cases where your Mac has the Apple T2 Security Chip (2018 and later devices), it may be your Startup Security Utility settings that are preventing you from booting from USB. In this situation, restart your Mac and hold down the Command + R keys when you see the Apple logo. This will put your Mac into Recovery mode. In macOS Utilities, go to Utilities >Startup Security Utility and sign in as admin. Under External Boot, select the second option - Allow Booting from External Media.
Option ROM Firmware: Another known issue is that Option ROM firmware will not load in Startup Manager until you press certain keys manually. To do this, use Method 1 to access Startup Manager. Once you are there, press Option-Shift-Command-Period. You should now be able to see the USB drive. This is not exactly a problem as much as a feature. If the USB contains Option ROM firmware, you will need to press those keys everytime to boot from your pen drive.
These two methods and the troubleshooting tips should allow you to boot from USB or in Safe Mode so you can then isolate the problem that's preventing your Mac from booting up normally.