This tutorial will show you how to create a portable Windows USB drive that supports Intel-based Mac computers, then you can run Windows on a Mac computer (Intel-based) to complete the work that must be done under Windows.
I hav a late 2016 MacBook Pro with MacOS and Windows 10 Pro dual systems installed on it, so far so good, but I only use Windows 10 Pro to play some games that can't be run on MacOS. Now I'm trying to get rid of my Bootcamp installation, because of low space on main SSD drive. I noticed that WinToUSB can install Windows to a USB drive, can the Windows USB drive created by WinToUSB be started from a Mac computer? How do I make it? Could let me know step by step for using your tool Hasleo WinToUSB.
Yes, the portable Windows (Windows To Go) USB drive created by Hasleo WinToUSB can be started from an Intel-based Mac computer (not Apple M1/M2 Mac computer), but not all portable Windows USB drive created by Hasleo WinToUSB can be started from an Intel-based Mac computer, so we need to understand what causes the portable Windows USB drive to fail to boot and then we can effectively avoid it.
1. Now not all Apple's computers use Intel CPUs (Newer Mac computers use Apple's M1/M2 chips), so you should make sure that your Mac uses an Intel CPU.
2. Apple selected the Intel-designed Extensible Firmware Interface (EFI) as its BIOS firmware to replace the Open firmware used on the PowerPC architecture. So in order to boot Windows on an Intel-based Mac computer, we have to make sure that the portable Windows USB drive that we created supports EFI booting.
2. For booting Windows on an (U)EFI-based computer, the Windows version must match the PC architecture, that means a 64-bit (U)EFI-based computer can only boot 64-bit versions of Windows and a 32-bit (U)EFI-based computer can only boot 32-bit versions of Windows. Intel-based Mac computers use a 64-bit Intel CPU, so make sure you use 64-bit Windows to create portable Windows.
Step 1. Download Mac Boot Camp Support Software for Windows To Go, please refer to:How to download Boot Camp Windows Support Software for Windows To Go?
Step 2. Copy the Boot Camp Support Software downloaded in the previous step to the computer with an installed copy of WinToUSB, and connect the external hard drive to the computer, run Hasleo WinToUSB and then click the "Windows To Go USB".
Step 3. Click "Select installation source", then click "Browse image file" and select the Windows Server installation ISO file from the open dialog box as installation source, or choose a CD/DVD drive with a Windows Server installation DVD inserted as the installation source.
Step 4. Hasleo WinToUSB scans for and lists installable operating systems, select the edition of Windows you want to install.
Step 5. Click "Select destination drive" and select the destination drive from the pop-up drive list. If the drive is not correctly recognized by Hasleo WinToUSB, you can click the 
button for the program to recognize the drive.
Step 6. Choose the partition scheme and installation mode you want to use, specify the directory of the additional drivers as the save path of Boot Camp Support Software, and enable BitLocker to encrypt the Windows To Go external hard drive if you want, then click "Proceed".
* Tips:
Step 7. After clicking "Proceed", a pop-up will appear asking you if you want to format it to continue, click "Yes" if you are sure.
Step 8. After clicking "Yes", WinToUSB begins installing Windows to the destination drive.
Step 9. It takes some time to install. After installation, safely unplug the USB drive from the Windows computer, then connect the USB drive to the Mac computer you want to boot. If you have only the USB-C interface on your Mac computer, you will need to use the USB-C to USB Adapter to connect the USB device to your Mac computer.
Step 10. Power on the Mac computer, and then immediately hold down the Option key, then select the USB drive and press Return to boot from it.
Step 11. Windows normal installation starts up and you have to complete all the installation steps. If the Mac's own keyboard or touchpad does not work, you have to use an external USB keyboard or mouse to complete the installation. After that, you can install Windows Support Software (Boot Camp drivers), programs, copy files, etc.
Now you know how to install and run portable Windows (Windows To Go) on an Intel-based Mac computer with the best free Windows To Go Creator Hasleo WinToUSB, you can also use WinToUSB to clone existing Boot Camp Windows to a USB drive and then boot Windows from that USB drive on an Intel-based Mac computer.
