When you install Microsoft Windows on your Mac, Boot Camp Assistant automatically opens the Boot Camp installer, which installs the latest Windows support software (drivers). If that doesn't happen, or you experience any of the following issues while using Windows on your Mac, follow the steps in this article.

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• Your Apple mouse, trackpad, or keyboard isn't working in Windows.
  Force Touch isn't designed to work in Windows.
• You don't hear audio from the built-in speakers of your Mac in Windows.
• The built-in microphone or camera of your Mac isn't recognized in Windows.
• One or more screen resolutions are unavailable for your display in Windows.
• You can't adjust the brightness of your built-in display in Windows.
• You have issues with Bluetooth or Wi-Fi in Windows.
• You get an alert that Apple Software Update has stopped working.
• You get a message that your PC has a driver or service that isn't ready for this version of Windows.
• Your Mac starts up to a black or blue screen after you install Windows.

If your Mac has an AMD video card and is having graphics issues in Windows, you might need to update your AMD graphics drivers instead.

Install the latest macOS updates

Before proceeding, install the latest macOS updates, which can include updates to Boot Camp.

Format a USB flash drive

To install the latest Windows support software, you need a 16GB or larger USB flash drive formatted as MS-DOS (FAT).

1. Start your Mac from macOS.
2. Plug the USB flash drive into your Mac.
3. Open Disk Utility, which is in the Utilities folder of your Applications folder.
4. Choose View > Show All Devices from the menu bar.
5. From the sidebar in Disk Utility, select your USB flash drive. (Select the drive name, not the volume name beneath it.)
   
6. Click the Erase button or tab.
7. Choose MS-DOS (FAT) as the format and Master Boot Record as the scheme.
8. Click Erase to format the drive. When done, quit Disk Utility.

Download the Windows support software

After preparing your USB flash drive, complete these steps:

1. Make sure that your Mac is connected to the Internet.
2. Open Boot Camp Assistant, which is in the Utilities folder of your Applications folder.
3. From the menu bar at the top of your screen, choose Action > Download Windows Support Software, then choose your USB flash drive as the save destination. When the download completes, quit Boot Camp Assistant.
   

Learn what to do if you can't download or save the Windows support software.

Install the Windows support software

After downloading the Windows support software to your flash drive, follow these steps to install the software. (If you're attempting to resolve issues with a Bluetooth mouse or keyboard, it might be easier to use a USB mouse or keyboard until these steps are complete.)

1. Make sure that the USB flash drive is plugged into your Mac.
2. Start up your Mac in Windows.
3. From File Explorer, open the USB flash drive, then open Setup or setup.exe, which is in the WindowsSupport folder or BootCamp folder. When you're asked to allow Boot Camp to make changes to your device, click Yes.
4. Click Repair to begin installation. If you get an alert that the software hasn't passed Windows Logo testing, click Continue Anyway.
5. After installation completes, click Finish, then click Yes when you're asked to restart your Mac.

Learn more

If you can't download or save the Windows support software:

• If the assistant says that the Windows support software could not be saved to the selected drive, or that the USB flash drive can't be used, make sure that your USB flash drive has a storage capacity of at least 16GB and is formatted correctly.
• If the assistant doesn't see your USB flash drive, click Go Back and make sure that the drive is connected directly to the USB port on your Mac—not to a display, hub, or keyboard. Disconnect and reconnect the drive, then click Continue.
• If the assistant says that it can't download the software because of a network problem, make sure that your Mac is connected to the Internet.
• Make sure that your Mac meets the system requirements to install Windows using Boot Camp.

If a Mac feature still doesn't work after updating the Windows support software, search for your symptom on the Apple support website or Microsoft support website. Some features of your Mac aren't designed to work in Windows.

USB port types and names

USB (Universal Serial Bus) is an industry standard for connecting computers and other devices. It's available with many types of ports, and each type has a unique shape. On Mac computers, USB is available with these ports, depending on your Mac model:

USB-A

Type USB-A ports are commonly called USB, USB 2, or USB 3 ports, depending on the USB specification they support. They aren't reversible, so a USB-A connector plugs into the port only when oriented correctly.

USB-C

Type USB-C ports are available as either standard USB-C ports or Thunderbolt 3 ports that also support USB-C connections. They both look the same, and the connector plugs into the port in either orientation.

Learn more about identifying the ports on your Mac, as well as the adapters and cables you can use to connect older devices to type USB-C ports.

USB specifications

USB specifications are important primarily when you want the most speed and power for your USB device, or your device needs more power or is using too much power. Every USB port supports a particular USB specification, which determines the port's maximum>USB specifications on MacData transferPowerUSB 3.1 Gen 2
Also known as USB 3.2 Gen 2
Up to 10 GbpsUp to 15W at 5VUSB 3.1 Gen 1
Also known as USB 3.2 Gen 1 or USB 3
Up to 5 GbpsUp to 900 mA at 5VUSB 2.0
Up to 480 MbpsUp to 500 mA at 5VUSB 1.1
Up to 12 MbpsUp to 500 mA at 5V

To learn which specification is supported by a type USB-A or type USB-C port on your Mac model:

• Choose Apple menu  > About This Mac, click Support, then click Specifications.
• Check the System Information app for more details, including about USB devices connected to USB ports on your Mac. Select USB in the sidebar, then select a USB bus on the right.

Get the best performance from your USB devices

USB specifications all work with each other, but speed and power are limited by the cable or device that uses the earliest specification. For example, if you connect a USB 3 device to USB 2 port, your device is limited to USB 2 speeds, and it can't draw more power from the port than can be delivered over USB 2. In other words, to get the best performance, make sure that the USB port on your Mac and the USB cable to your device meet or exceed the USB specification of the device itself.

If your Mac doesn't recognize a USB device after you plug it into your Mac:

• Check all connections: Unplug the device from your Mac, then plug it back in, and make sure that all cables and adapters are securely connected at both ends. Test with another cable or adapter, if available.
• Plug the device directly into your Mac instead of a USB hub or other device, and if necessary test with a different USB port on your Mac or device.
• Some devices need their own software, such as drivers or firmware. Others work without additional software. Check with the maker of your device, and install all available Apple software updates as well.
• If your device came with an AC power adapter, use it. Some devices can be powered by the USB port on your Mac. Others need more power than your Mac can provide.
• Restart your Mac.

Learn more

• USB 3 devices can create wireless interference that affects Wi-Fi and Bluetooth devices. Learn how to resolve Wi-Fi and Bluetooth issues caused by wireless interference.
• Mac notebook computers with USB-C or Thunderbolt 3 can charge over that port using a compatible USB-C power adapter and cable.