Editor’s note: This guide was completely rewritten for 2026. Older comments below the article refer to a previous external-boot method that we no longer recommend or include.
You do not need Boot Camp to install Windows on a Mac in 2026. In fact, if you have an Apple Silicon Mac, Boot Camp is not available at all.
The easiest way to use Windows without Boot Camp is to install Windows 11 in a virtual machine using Parallels Desktop 26, VMware Fusion Pro or UTM.
A virtual machine runs Windows and macOS at the same time, so there is no need to restart your Mac whenever you want to open a Windows application.
If storage space is your main concern, you can also keep the entire Windows virtual machine on an external SSD. This gives you most of the space-saving benefit promised by the old external-boot method without relying on an unsupported Windows installation.
Here is the situation in brief:
| Method | Apple Silicon Macs | Intel Macs | Runs Windows from an external SSD? | Best for |
|---|---|---|---|---|
| Parallels Desktop | Yes, Windows 11 on Arm | Yes | Yes | The easiest and most polished option |
| VMware Fusion Pro | Yes, Windows 11 on Arm | Yes | Yes | A free virtual machine |
| UTM | Yes | Yes | Yes | Free, open-source use and testing |
| Windows 365 | Yes | Yes | Nothing is installed locally | Business users who want a cloud PC |
| Native Windows on an external drive | No | Unofficial only | Yes, but not supported | Not recommended |
Why Not Use Boot Camp?
Boot Camp was once the best way to run Windows at full speed on a Mac, especially for gaming. However, it is now a legacy option with some significant limitations.
- Boot Camp only works on Intel Macs. It is not available on any Apple Silicon Mac.
- Apple only officially documents Boot Camp for Windows 10, not Windows 11.
- Standard support for Windows 10 ended on October 14, 2025.
- You must restart the Mac whenever you want to switch between macOS and Windows.
- Boot Camp normally requires a permanent Windows partition on the Mac’s internal drive.
If you still use an Intel Mac and need the best possible performance from a Windows game or other graphics-intensive software, Boot Camp can still have an advantage over virtualization. However, it is increasingly difficult to recommend for a new installation because Apple’s supported version of Windows is now out of standard support.
You can read our overview of the best ways to run Windows on a Mac for a fuller comparison.
Can Apple Silicon Macs Boot Windows Without Boot Camp?
Apple Silicon Macs cannot boot Windows natively, either from the internal drive or an external SSD.
This is not simply a security setting that can be disabled. Apple does not provide the firmware support or Windows drivers needed to boot Windows directly on an M-series Mac.
You can still run Windows 11 extremely well in a virtual machine. On Apple Silicon Macs, this means the Arm version of Windows 11 rather than the Intel x64 version.
Windows 11 on Arm can run native Arm applications as well as many Intel-based x64 and x86 Windows programs through Microsoft’s built-in emulation. However, some games, hardware drivers and applications with low-level system requirements may not work.
Microsoft identifies Parallels Desktop and Windows 365 as supported ways to use Windows 11 on Apple Silicon Macs.
Why We No Longer Recommend the Etcher Method
Older versions of this guide explained how to use Etcher to write a Windows ISO to an external drive and then boot the Mac from it. We no longer recommend those instructions.
Etcher can flash disk images, but writing a current Windows ISO to an SSD does not create a normal, supported portable Windows 11 installation.
Microsoft’s former portable installation feature was called Windows To Go. Microsoft removed Windows To Go in Windows 10 version 2004, and its documentation specifically states that using Windows To Go on a Mac was not supported.
There are third-party utilities that attempt to create a Windows-to-USB installation for an Intel Mac. However, they require a Windows PC or virtual machine, model-specific Apple drivers and often changes to the Mac’s startup security settings. Windows 11 may also require unsupported hardware-check workarounds on an Intel Mac.
This can leave you with a vulnerable installation that may fail after a Windows update, so it is not a method we recommend for everyday use in 2026.
Method 1: Install Windows 11 With Parallels Desktop
Parallels Desktop 26 is the easiest way to install Windows without Boot Camp. It works on both Apple Silicon and Intel Macs and does not require you to partition the internal drive.
On an Apple Silicon Mac, Parallels downloads and installs Windows 11 on Arm automatically. You do not need to find an ISO file or install Apple Boot Camp drivers.
To install Windows with Parallels:
- Download and install Parallels Desktop on your Mac.
- Open Parallels. If no virtual machines already exist, select Install Windows when prompted.
- If the Control Center opens instead, click the + button and select Get Windows 11 from Microsoft.
- Click Continue, followed by Install Windows.
- Parallels will download Windows 11, create the virtual machine and complete most of the installation automatically.
- Accept Microsoft’s licence terms when prompted and finish the Windows setup.
Parallels Tools is installed as part of the process. This provides proper display scaling, shared clipboard support, file sharing and smooth mouse and keyboard integration, so you do not need an external keyboard or mouse.
Windows requires its own licence. Although Windows Setup may allow you to complete the installation without immediately entering a product key, Microsoft requires a separate licence for each Windows virtual machine you activate.
How To Run the Parallels Windows Installation From an External SSD
By default, Parallels saves its virtual machines in your Mac user folder. A Windows virtual machine can consume tens or even hundreds of gigabytes once you install updates and applications.
If you do not have enough internal storage, you can move the complete virtual machine to an external SSD and run it from there.
This does not make Windows boot natively from the SSD. Parallels still runs in macOS, but the large virtual disk and most of the Windows installation are stored on the external drive.
We strongly recommend a fast USB 3.2, USB4 or Thunderbolt SSD rather than a mechanical hard drive. A capacity of at least 256GB is sensible, although 500GB or more is better if you plan to install large applications or games.
To move a Parallels virtual machine to an external SSD:
- Connect the external SSD to your Mac.
- If it is a new or empty drive, use Disk Utility to format it. APFS is the best choice if the drive will only be used with Macs. Formatting a drive erases everything already stored on it.
- Start Windows in Parallels and select Actions > Shut Down. Do not leave the virtual machine suspended.
- Open the Parallels Control Center, right-click the Windows virtual machine and select Show in Finder.
- Quit Parallels Desktop.
- Copy the virtual machine’s
.pvmfile to the external SSD. Do not delete the original yet. - Double-click the
.pvmfile on the external SSD to open it in Parallels. - If Parallels asks whether the virtual machine was moved or copied, select Moved.
- Start Windows and check that your applications and files are present.
- Once you have confirmed that the external copy works and have a separate backup, you can delete the original
.pvmfile from your Mac to reclaim the space.
Parallels officially supports running a virtual machine from an external drive and recommends using an SSD.
Always shut down the virtual machine before disconnecting the SSD. Removing it while Windows is running or suspended risks corrupting the virtual disk.
You should also back up the external drive. Moving a virtual machine off your Mac’s internal disk does not make it a backup.
Method 2: Use VMware Fusion Pro for Free
VMware Fusion Pro is the best free alternative to Parallels for users who want to run a complete Windows installation.
Broadcom currently makes VMware Fusion Pro free for personal, educational and commercial use, with no licence key required for the free version.
Fusion works on both Intel and Apple Silicon Macs. On Apple Silicon, you must install the Arm64 version of Windows 11 because an x64 Windows virtual machine cannot run directly on an Arm processor.
The basic installation process is:
- Download and install VMware Fusion Pro.
- Select File > New or Create New Virtual Machine.
- Select Get Windows from Microsoft and click Continue.
- Choose Windows 11 Pro and select Download Windows.
- Follow the setup assistant to create an encrypted virtual machine with a virtual Trusted Platform Module.
- Complete Windows Setup and then select Virtual Machine > Install VMware Tools to install the display and integration drivers.
Fusion is not quite as seamless as Parallels and usually requires more manual setup. However, it is a capable option if you do not want to pay for a virtual-machine subscription.
You can also save a Fusion virtual machine on an external SSD by choosing the external drive as its location when creating it, or by shutting it down fully before moving its virtual-machine bundle.
Method 3: Use UTM
UTM is a free, open-source virtual machine that works on both Apple Silicon and Intel Macs.
On Apple Silicon, it can virtualize Windows 11 on Arm efficiently. It can also emulate other processor architectures, although emulating x64 Windows on Apple Silicon is much slower than virtualizing Windows on Arm.
UTM is useful for testing, older software and users who prefer an open-source option. However, it requires more manual configuration than Parallels and its graphics support makes it a poor choice for most Windows gaming.
As with Parallels and Fusion, you can store the UTM virtual machine on an external SSD to reduce the amount of internal storage it consumes.
Method 4: Use a Windows 365 Cloud PC
If you do not want to install Windows locally at all, Windows 365 streams a complete Windows desktop to your Mac over the internet.
The Windows installation runs on Microsoft’s servers, so it does not occupy your Mac’s storage and it is not affected by the processor architecture of your Mac.
Windows 365 is mainly aimed at businesses and requires an ongoing subscription. It also needs a reliable internet connection, so it is not the most economical choice for occasional home use.
Its advantage is compatibility. Because Windows runs on a Cloud PC rather than directly on your Mac’s processor, it avoids many of the architecture-related limitations of a local Windows 11 on Arm virtual machine. It is not suitable for latency-sensitive gaming, however.
Can You Run Windows Apps Without Installing Windows?
If you only need one Windows application or game, you may not need a complete Windows installation.
Compatibility-layer software such as CrossOver can run Windows programs and games directly in macOS and Pixel Port can run Steam windows games on a Mac. They do not install Windows, so they use less storage and do not require a Windows licence.
Compatibility varies considerably, especially with games that use anti-cheat systems, specialist hardware drivers or newer graphics features. We therefore recommend checking whether your specific application is supported before choosing this route.
What Is the Best Way To Install Windows Without Boot Camp?
For most Mac users, Parallels Desktop is the best way to install Windows without Boot Camp. It is the simplest option, works on both Apple Silicon and Intel Macs and provides the best integration between Windows and macOS.
VMware Fusion Pro is the best choice if you want a free virtual machine and do not mind a little more setup.
If internal storage is the problem, put the Parallels, Fusion or UTM virtual machine on a fast external SSD. This is much safer and easier to maintain than trying to boot an unsupported Windows 11 installation directly from a USB drive.
Intel Mac users who require maximum native gaming performance can still investigate Boot Camp, but they should be aware that Apple officially supports Windows 10 rather than Windows 11 and that Windows 10 has reached the end of standard support.
Frequently Asked Questions
Can I install Windows 11 on a Mac without Boot Camp?
Yes. You can install Windows 11 in Parallels Desktop, VMware Fusion Pro or UTM on both Apple Silicon and Intel Macs. On Apple Silicon, the virtual machine must normally use Windows 11 on Arm.
Can an M-series Mac boot Windows from an external SSD?
No. Apple Silicon Macs do not support booting Windows natively from either the internal drive or an external SSD. You can store a Windows virtual machine on an external SSD and run it through macOS instead.
Can an Intel Mac boot Windows from an external drive?
It is technically possible using unofficial third-party Windows-to-USB tools, but neither Apple nor Microsoft supports this configuration. Microsoft removed Windows To Go, and Windows 11 usually requires additional workarounds on Intel Macs. We do not recommend it as a dependable everyday installation.
Is Windows free to use on a Mac?
No. Some virtual-machine applications, including VMware Fusion Pro and UTM, are free, but Windows is separately licensed. Windows Setup may allow installation before activation, but a valid Windows licence is required to activate and properly license each virtual machine.
Do I need a Windows ISO file?
Not necessarily. Parallels Desktop and current versions of VMware Fusion can download the correct Windows 11 installation image for you. UTM and more advanced manual setups may require you to download an appropriate Windows ISO.
Will every Windows program work on an Apple Silicon Mac?
No. Windows 11 on Arm can run many Arm, x64 and x86 applications, but compatibility is not universal. Programs that depend on specialist drivers, nested virtualization, some anti-cheat systems or unsupported graphics features may not work.
Is Windows slower when the virtual machine is on an external SSD?
A fast USB4 or Thunderbolt SSD can perform very well, although the experience may be slightly slower than using the Mac’s internal storage. Mechanical hard drives and basic USB flash drives are much slower and should be avoided.