Windows on mac without mac os

Install Windows 10 on your Mac with Boot Camp Assistant

With Boot Camp, you can install Microsoft Windows 10 on your Mac, then switch between macOS and Windows when restarting your Mac.

What you need to install Windows 10 on Mac

• MacBook introduced in 2015 or later
• MacBook Air introduced in 2012 or later
• MacBook Pro introduced in 2012 or later
• Mac mini introduced in 2012 or later

• iMac introduced in 2012 or later 1
• iMac Pro (all models)
• Mac Pro introduced in 2013 or later

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:

• Your Mac can have as little as 64GB of free storage space, but at least 128GB of free storage space provides the best experience. Automatic Windows updates require that much space or more.
• If you have an iMac Pro or Mac Pro with 128GB of memory (RAM) or more, your startup disk needs at least as much free storage space as your Mac has memory. 2

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.

• If your copy of Windows came on a USB flash drive, or you have a Windows product key and no installation disc, download a Windows 10 disk image from Microsoft.
• If your copy of Windows came on a DVD, you might need to create a disk image of that DVD.

How to install Windows 10 on Mac

To install Windows, use Boot Camp Assistant, which is included with your Mac.

1. Check your Secure Boot setting

Learn how to check your Secure Boot setting. The default Secure Boot setting is Full Security. If you changed it to No Security, change it back to Full Security before installing Windows. After installing Windows, you can use any Secure Boot setting without affecting your ability to start up from Windows.

2. Use Boot Camp Assistant to create a Windows partition

Open Boot Camp Assistant, which is in the Utilities folder of your Applications folder. Follow the on-screen instructions.

• If you’re asked to insert a USB drive, plug your USB flash drive into your Mac. Boot Camp Assistant will use it to create a bootable USB drive for Windows installation.
• When Boot Camp Assistant asks you to set the size of the Windows partition, remember the minimum storage-space requirements in the previous section. Set a partition size that meets your needs, because you can’t change its size later.

3. 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.

4. Install Windows

Unplug any external devices that aren’t necessary during installation. Then click Next and follow the onscreen instructions to begin installing Windows.

5. 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.

• If the Boot Camp installer never opens, open the Boot Camp installer manually and use it to complete Boot Camp installation.
• If you have an external display connected to a Thunderbolt 3 port on your Mac, the display will be blank (black, grey or blue) for up to 2 minutes during installation.

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 Intel-based Mac models using OS X El Capitan or later, you don’t need a USB flash drive to install Windows:

• MacBook introduced in 2015 or later
• MacBook Air introduced in 2017 or later 3
• MacBook Pro introduced in 2015 or later 3

• iMac introduced in 2015 or later
• iMac Pro (all models)
• Mac Pro introduced in late 2013 or later

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.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Contact the vendor for additional information.

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Restart your Mac in macOS or Windows

After installing Microsoft Windows on your Mac, you can choose whether your Mac starts up in macOS or Windows.

How to start up in macOS from Windows

1. From the notification area on the right side of the Windows taskbar, click to show hidden icons.
2. Click the Boot Camp icon .
3. From the menu shown, choose Restart in macOS.
   If you haven’t installed the latest Boot Camp updates, you might get the message ”Could not locate the OS X boot volume.»
   

Or use Startup Manager as your Mac starts up:

1. Restart your Mac from the Start menu in Windows.
2. Press and hold the Option (or Alt) ⌥ key as your Mac begins to restart.
3. Select your Mac startup volume (Macintosh HD) in the Startup Manager window, then press Return or click the up arrow:
   

How to start up in Windows from macOS

• Use Startup Manager to choose your Windows (Boot Camp) volume during startup.
• Or select your Boot Camp volume in Startup Disk preferences, then restart.

Learn more

• If you’re having difficulty using VoiceOver or another screen reader to complete these steps, please contact Apple Support.
• Learn how to install Windows 10 on your Mac.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Contact the vendor for additional information.

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Installing Windows 10 on a Mac without Bootcamp

Installing Windows on a Mac should be a piece of cake with Bootcamp, but that rarely is the case. In fact, I would personally say that Boot Camp Assistant is one of the worst apps that comes with OS X and unlike the rest, it doesn’t work seamlessly.

A few of its drawbacks:

• It only supports a drive with a single partition.
• It often throws very obscure error messages with limited detail.
• It re-downloads 1.6 GB Windows drivers every single time it runs. These are placed under /Library/Application Support/BootCamp/WindowsSupport.dmg and deleted and re-downloaded each time Boot Camp Assistant starts processing.

This post did take a lot of work to complie and I did bone my hard drive a few times while trying certain ideas, so please throw out a thanks if it helped you out 🙂

Disclaimer: This guide below contains procedures which can potentially destroy your partitions and data. I accept no responsibility for such loss so please proceed at your own risk.

Update (2016-07-20): I have updated this post with further improvements relating to downloading of Boot Camp drivers and ensuring that a Hybrid MBR is not used (which would cause issues when installing Windows).

What You Will Need

• An 8 GB or larger USB stick
• A copy of the Windows 10 ISO
• A valid Windows 10 license
• A downloaded copy of unetbootin

Downloading Boot Camp Drivers

1. Start Boot Camp Assistant
2. Select Action / Download Windows Support Software
3. Choose your Downloads directory, enter your password and then click Save

This will be the only step that we will use Boot Camp Assistant for.

Creating a Bootable USB Windows 10 Installer

Formatting Your USB Stick

Attach your USB stick and start Disk Utility, select your USB drive in the left panel under External, click Erase and set the options as follows (exactly) and click Erase:

Name: FAT32
Format: MS-DOS (FAT)
Scheme: Master Boot Record

Turning Your USB Stick into a Windows Installer

Open unetbootin, enter your password, set the options as follows and click OK:

Diskimage: checked, set to ISO and browse to your Windows 10 ISO
Type: USB Drive
Drive: Your USB drive (you should only see one entry here)

If you see more than one drive listed, you may confirm which is your USB drive by opening the Terminal and typing:

You’ll see your USB drive in the output and it should look something like this:

Once you have kicked off unetbootin, grab a snack while the Windows ISO is copied to the USB stick. This process takes around 15 minutes to complete.

Finishing Up

When this has completed, you may right click on the USB stick in Finder, select Rename “FAT32” and rename it as you like (I’ll call mine “WINDOWS 10”).

Finally, copy the WindowsSupport in your Downloads directory to the Windows 10 USB stick so it’s easy to get to after our installation.

Partitioning Your Drive

In Disk Utility, select your internal hard drive on the left panel, and click on Partition.

Click the + button and create a new partition of your desired size for your Windows installation and name it as you wish (I’ll call mine “BOOTCAMP”). Ensure that the Format is set to MS-DOS (FAT) and click on Apply.

Ensuring that a Hybrid MBR is not used

Huge thanks to Rod’s post from the superuser post titled Windows detects GPT disk as MBR in EFI boot.

Once you add a FAT32 partition with either Boot Camp Assistant or Disk Utility, your disk is converted into a hybrid GPT / MBR disk which is actually not supported by newer versions of Windows. In this step, we revert this additional change made by Disk Utility by switching back to a pure GPT partition table.

Dowload the latest version of GPT fdisk by browsing to the version, then gdisk-binaries and clicking the file with the *.pkg extension (e.g. gdisk-1.0.1.pkg).

Install GPT fdisk by running the installer you downloaded

Open a Terminal and check the state of your MBR

If your MBR partition is set to hybrid, please continue with step 4, otherwise if it is set to protective, you may skip the rest of this section. Simply type q and hit return to exit GPT fdisk.

Type p to view the existing partition table and verify you’re working on the correct disk

Type x to enter the expert menu

Type n to create a fresh protective MBR

Type w to save your changes and confirm the change when asked

Type q to exit GPT fdisk

Run GPT fdisk to show your disk layout:

Your partition table should look something like this:

Installing Windows

Disconnecting All Devices From USB Ports

This step is critical as I have had rather serious problems during Windows installation when certain external drives are connected.

Unplug everything from your Mac except your keyboard (if wired) and your bootable Windows USB stick (which we prepared earlier).

If your Mac contains multiple physical drives, you will need to disconnect all disks except the one which you intend to install Windows on or you may encounter the following error:

Windows could not prepare the computer to boot into the next phase of installation. To install Windows, restart the installation.

Booting From the USB Stick

Ensure that the USB stick containing the Windows installer is inserted and then restart your Mac while holding down the option (alt) key.

You should now be presented with a list of bootable drives. Select the USB drive (usually titled “EFI Boot”) to begin installing Windows.

Correcting Your Windows Hard Disk Partition

When you are asked Where do you want to install Windows?, select the Windows partition created earlier (which I called “BOOTCAMP”) and click Delete.

Next, select the chunk of Unallocated Space and click on New to create a proper Windows NTFS partition.

Note: OS X only supports creation of FAT filesystems, so this is why we need to re-create the partition ourselves during install.

Completing the Installation

Allow the installer to complete and boot into Windows.

Installing Boot Camp Support Software

Once Windows is up and running, install the Boot Camp Support software running WindowsSupport/BootCamp/Setup.exe on your USB stick.

Note: The installer takes a little while to show up, so please be patient.

You may encounter a known issue whereby the Boot Camp Support Software installer locks up while installing Realtek audio.

If this occurs, you will need to open Task Manager and kill the RealtekSetup.exe process.

After the installer has completed, answer No when prompted to reboot and install the Realtek drivers manually by running %USERPROFILE%\AppData\Local\Temp\RarSFX0\BootCamp\Drivers\RealTek\RealtekSetup.exe. If you can’t find this file, check any other directories starting with RARSFX under %USERPROFILE%\AppData\Local\Temp.

Once complete, reboot Windows.

What You Will Need to Configure Windows

• The latest version of SharpKeys
• The flipflop-windows-sheel binary (see README for a download link)

Configuring Windows

Mapping Your Mac Keyboard

Install and run SharpKeys and then configure the following mappings to correct your Mac keyboard so that it behaves like a regular Windows keyboard:

Function: F13 -> Special: PrtSc
Special: Left Alt => Special: Left Windows
Special: Left Windows => Special: Left Alt
Special: Right Alt => Special: Right Windows
Special: Right Windows => Special: Right Alt

Note: for F13, you’ll need to select Press a key and click F13 on your keyboard.

Switching to Natural Scrolling

If you wish to flip scrolling direction to match that on OS X, run FlipWheel.exe and then click on Flip All.

Enabling Num Lock on Boot

Paste the following into a file named Enable NumLock on Boot.reg then import this into the registry to enable NumLock when Windows boots up (it doesn’t by default).

Completing Configuration

That’s it, give your machine one last reboot and you’ll have a fully working Windows 10 installation.

Note: I have found Apple’s Magic Mouse to be extremely unreliable using the Boot Camp drivers from Apple. As such, I recommend purchasing a Logitech (or similar) mouse for use in Windows. I have no trouble plugging the wireless receiver for my Logitech mouse into one of the USB ports of my wired Apple Keyboard and it’s so tiny that you can’t see it at all.

Cleaning up a Windows Installation

Removing the Windows Partitions

If you decide to remove Windows, you may find that Disk Utility doesn’t allow you to delete the two partitions that have been created by the Windows installer.

This happens due to the fact that the first small partition created is of a type called Microsoft Reserved which OS X’s Disk Utility doesn’t support.

The safest way to delete these partitions is through the Windows installer. So simply boot from your USB stick as we did before and when you reach the Where do you want to install Windows? question, you may delete your “BOOTCAMP” partition and the small 16 MB partition of type MSR (Reserved) just above the BOOTCAMP partition.

Once done, simply quit the installer by clicking the X in the top right corner of each Window and reboot back into OS X.

Removing the Boot Entry

Even though we have removed the Windows partition, a boot entry will still be present when holding down option (alt) during boot.

You may remove these items by running the following in your Terminal:

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