Install Windows on your newer Mac using Boot Camp

You can use Boot Camp Assistant to install Windows 10 on your Intel-based Mac.

Newer Mac computers use a streamlined method to install Windows on your Mac. To find out whether your Mac uses this method, see the “Learn more” section in the Apple Support article Install Windows 10 on your Mac with Boot Camp Assistant. If your Mac is an older model that requires an external USB drive, follow the instructions in Install Windows on your older Mac using Boot Camp instead.

What you need

The keyboard and mouse or trackpad that came with your Mac. If they aren’t available, use a USB keyboard and mouse.

A full-installation, 64-bit version of Windows 10 on a disk image (ISO file) or other installation media.

Sufficient free storage space on your startup drive. For information about the amount of free space needed, see the Apple Support Article Install Windows 10 on your Mac with Boot Camp Assistant.

Before you begin

Before you install Windows, make sure you back up important files.

You can use Time Machine or any other method to back up your files. For information about backing up files, see Back up your files with Time Machine and Ways to back up or protect your files.

Perform the installation

On your Mac, do the following steps in order.

Step 1: Check for software updates

Before you install Windows, install all macOS updates.

On your Mac, log in as an administrator, quit all open apps, then log out any other users.

Choose Apple menu > System Preferences, click Software Update, then install all available macOS updates.

If your Mac restarts after installing an update, open Software Update again to install any additional updates.

Step 2: Prepare your Mac for Windows

Boot Camp Assistant prepares your Mac by creating a new partition for Windows named BOOTCAMP and downloading the Boot Camp support software.

Important: If you’re using a Mac notebook computer, connect it to a power source before continuing.

On your Mac, open Boot Camp Assistant , located in /Applications/Utilities.

At the Introduction screen, click Continue.

The system is checked for total available disk space. Older Time Machine snapshots and cached iCloud files are removed to make space for Boot Camp. This process may take a long time to complete (you can click the Stop button to skip this process).

If you have only one internal disk, choose the Windows ISO image, specify the partition size by dragging the divider between the macOS and Windows partitions, then click Install.

Important: You can’t resize the partition later.

If you have multiple internal disks, follow the onscreen instructions to select and format the disk you want to install Windows on and to choose the Windows ISO image.

If you select your startup disk: You can create an additional partition for Windows. Specify the partition size by dragging the divider between the macOS and Windows partitions.

If you select an APFS-formatted disk: You can either create an additional partition on the disk for Windows, or erase the entire disk and create a partition for Windows. If you choose to create an additional partition, specify the partition size by dragging the divider between the macOS and Windows partitions.

If you select a non-APFS-formatted disk: You can erase the entire disk and create a partition for Windows.

If Boot Camp is already present on the disk you select, you also have the option to uninstall it.

Important: You can’t resize the partition later.

When this step is complete, the Windows installer starts.

Step 3: Install Windows

In the Windows installer, follow the onscreen instructions.

When the installation is finished, your Mac automatically restarts using Windows.

Follow the onscreen instructions to set up Windows.

Step 4: Install Boot Camp on Windows

After installing Windows, Boot Camp drivers that support your Mac hardware start installing.

Note: If the support software doesn’t install automatically, you need to install it manually. For instructions, see the Apple Support article If the Boot Camp installer doesn’t open after using Boot Camp Assistant.

In the Boot Camp installer in Windows, follow the onscreen instructions.

Important: Do not click the Cancel button in any of the installer dialogs.

If a message appears that says the software you’re installing has not passed Windows Logo testing, click Continue Anyway.

You don’t need to respond to installer dialogs that appear only briefly during installation, but if a dialog asks you to install device software, click Install.

If nothing appears to be happening, there may be a hidden window that you must respond to. Look behind open windows.

When the installation is complete, click Finish.

After your Mac restarts, follow the instructions for any other installers that appear.

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 onscreen 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, gray, 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.

Start up your Mac in Windows or macOS with Boot Camp

After you use Boot Camp Assistant to install Windows on your Intel-based Mac, you can set the default operating system to either macOS or Windows. The default operating system is the one you want to use when you turn on or restart your Mac.

Set the default operating system

In Windows on your Mac, click in the right side of the taskbar, click the Boot Camp icon , then choose Boot Camp Control Panel.

If a User Account Control dialog appears, click Yes.

Select the startup disk that has the default operating system you want to use.

If you want to start up using the default operating system now, click Restart. Otherwise, click OK.

You can’t change your startup volume to an external drive while you’re using Windows.

To learn how to change the default operating system using macOS, see Get started with Boot Camp.

Restart in macOS

In Windows on your Mac, do one of the following:

Restart using Startup Manager: Restart your Mac, then immediately press and hold the Option key. When the Startup Manager window appears, release the Option key, select your macOS startup disk, then press Return.

If you’re using a Mac notebook computer with an external keyboard, make sure you press and hold the Option key on the built-in keyboard.

Restart using Boot Camp Control Panel: Click in the right side of the taskbar, click the Boot Camp icon , then choose Restart in macOS.

This also sets the default operating system to macOS.

For more information about restarting in macOS, see the Apple Support article Restart your Mac in macOS or Windows.

Install Windows on your older Mac using Boot Camp

You can use Boot Camp Assistant to install Windows 10 on your Intel-based Mac.

You need an external USB drive to install Windows on older Mac computers. To find out whether you have a Mac that requires an external USB drive, see the “Learn more” section in the Apple Support article Install Windows 10 on your Mac with Boot Camp Assistant. If your Mac is a newer model that doesn’t require a USB drive, follow the instructions in Install Windows on your newer Mac using Boot Camp instead.

What you need

The keyboard and mouse or trackpad that came with your Mac. (If they aren’t available, use a USB keyboard and mouse.)

A blank 16 GB or larger external USB 2 flash drive, formatted as MS-DOS (FAT).

To format an external USB drive as MS-DOS (FAT), use Disk Utility, located in /Applications/Utilities. In Disk Utility, choose View > Show All Devices, select the USB drive in the sidebar, then click Erase in the toolbar. In the dialog, enter a name for the drive, choose MS-DOS (FAT) from the Format pop-up menu, choose Master Boot Record from the Scheme pop-up menu, then click Erase.

A full-installation, 64-bit version of Windows 10 on a disk image (ISO file) or other installation media.

Sufficient free storage space on your startup drive. For information about the amount of free space needed, see the Apple Support Article Install Windows 10 on your Mac with Boot Camp Assistant.

Before you begin

Before you install Windows, make sure you back up important files.

You can use Time Machine or any other method to back up your files. For information about backing up files, see Back up your files with Time Machine and Ways to back up or protect your files.

Perform the installation

Do the following steps in order.

Step 1: Check for software updates

Before you install Windows, install all macOS updates.

On your Mac, log in as an administrator, quit all open apps, then log out any other users.

Choose Apple menu > System Preferences, click Software Update, then install all available updates.

If your Mac restarts after installing an update, open Software Update again to install any additional updates.

Step 2: Prepare your Mac for Windows

Boot Camp Assistant prepares your Mac by creating a new partition for Windows named BOOTCAMP and downloading the Boot Camp support software.

Important: If you’re using a Mac notebook computer, connect it to a power source before continuing.

Connect an external USB drive or insert a flash drive into the USB port on your Mac; keep it connected or inserted while you install Windows and the Windows support software.

On your Mac, open Boot Camp Assistant , located in /Applications/Utilities.

At the introduction screen, click Continue.

The system is checked for total available disk space. Older Time Machine snapshots and cached iCloud files are removed to make space for Boot Camp. This process may take a long time to complete (you can click the Stop button to skip this process).

At the Select Tasks step, select all the tasks, then click Continue.

At the Create Bootable USB Drive for Windows Installation step, choose the Windows ISO image and the USB drive, then click Continue.

The Windows files are copied to the USB drive. This process may take a long time to complete (you can click the Stop button to interrupt this process).

At the Create a Partition for Windows step, specify a partition size by dragging the divider between the macOS and Windows partitions. If you have multiple internal hard drives, you can select a different hard drive from the one running macOS and create a single partition on that drive to use solely for Windows.

Important: You can’t resize the partition later.

When this step is complete, the Windows installer starts.

Step 3: Install Windows

In the Windows installer, follow the onscreen instructions.

When you’re asked where to install Windows, select the BOOTCAMP partition (you may need to scroll through the list of partitions to see it), then click Next.

WARNING: Do not create or delete a partition, or select any other partition. Doing so may delete the entire contents of your macOS partition.

Continue following the onscreen instructions to finish installing Windows.

After you install the Windows software, your Mac automatically restarts using Windows.

Follow the onscreen instructions to set up Windows.

Step 4: Install Boot Camp on Windows

After installing Windows, Boot Camp drivers that support your Mac hardware start installing.

Note: If the support software doesn’t install automatically, you need to install it manually. For instructions, see the Apple Support article If the Boot Camp installer doesn’t open after using Boot Camp Assistant.

In the Boot Camp installer in Windows, follow the onscreen instructions.

Important: Do not click the Cancel button in any of the installer dialogs.

If a message appears that says the software you’re installing has not passed Windows Logo testing, click Continue Anyway.

You don’t need to respond to installer dialogs that appear only briefly during installation, but if a dialog asks you to install device software, click Install.

If nothing appears to be happening, there may be a hidden window that you must respond to. Look behind open windows.

When the installation is complete, click Finish, then click Yes to restart your Mac.

After your Mac restarts, follow the instructions for any other installers that appear.