Connect USB Devices

Many USB devices, such as mice and printers, are available by default to both Windows and Mac OS X when you connect them to your Mac.

Some USB devices, such as an Apple iPhone, can only be used with either Mac OS X applications or Windows programs, but not both at the same time. When you connect such a device, you can choose whether you want to use it with Mac OS X or Windows.

To connect a USB device:

Connect the device to a USB port on your Mac.
If Windows is running and the device can't be used with both Windows and Mac OS X at the same time, you're prompted to choose which one you want to use it with. To use the device with Mac OS X applications, click the Mac icon. To use it with Windows programs, click the Windows screen.

You can connect up to 15 USB 2.0 and 32 USB 1.1 devices to your Mac and use them with Windows. You can connect and use up to 30 USB printers.

Important: To be able to use a USB device with Windows programs, you may need to install Windows drivers for the device. Typically you can download drivers from the manufacturer's website.

You can also set what happens when any new USB device is connected and set particular USB devices to always be used with either Mac OS X or Windows .

Connect a Common Access Card reader

A Common Access Card (CAC) reader can work simultaneously in Mac OS X and Windows.

Connect the CAC reader to your Mac.
When you're prompted to choose Windows or the Mac, click the Windows screen. The CAC reader becomes available to both Windows and Mac OS X.