If your computer doesn't recognize your connected device, you might see an unknown error or a '0xE' error. If you do, follow these steps and try to connect your device again after each step:
- Make sure that your iOS or iPadOS device is unlocked and on the Home screen.
- Check that you have the latest software on your Mac or Windows PC. If you're using iTunes, make sure you have the latest version.
- Make sure that your device is turned on.
- If you see a Trust this Computer alert, unlock your device and tap Trust.
- Unplug all USB accessories from your computer except for your device. Try each USB port to see if one works. Then try a different Apple USB cable.*
- Restart your computer.
- Restart your device:
- Try connecting your device to another computer. If you have the same issue on another computer, contact Apple Support.
For more help, follow the steps below for your Mac or Windows PC.
Mac Windows Usb
Mac Compatibility Mac Compatibility MacBook Air (M1, 2020) MacBook Air (Retina, 13-inch, 2020).
Google photos app for pc.
* Learn how to connect iPad Pro (11-inch) or iPad Pro 12.9-inch (3rd generation) to your computer.
Google photos app for pc.
* Learn how to connect iPad Pro (11-inch) or iPad Pro 12.9-inch (3rd generation) to your computer.
If you use a Mac
- Macally Full Size USB Wired Computer Keyboard with Built-In 2-Port USB Hub - Perfect for your Mouse & 16 Apple Shortcut Keys for Mac OS, Apple iMac, Mac Mini, Macbook Pro/Air (XKEYHUB).
- Type USB-C ports are available on Mac as standard USB-C ports, Thunderbolt 3 ports, and Thunderbolt / USB 4 ports. They all 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.
- Connect your iOS or iPadOS device and make sure that it's unlocked and on the Home screen.
- On your Mac, hold down the Option key, click the Apple menu, and choose System Information or System Report.
- From the list on the left, select USB.
- If you see your iPhone, iPad, or iPod under USB Device Tree, get the latest macOS or install the latest updates. If you don't see your device or still need help, contact Apple Support.
If you use a Windows PC
The steps differ depending on if you downloaded iTunes from the Microsoft Store or from Apple.
If you downloaded iTunes from the Microsoft Store
Follow these steps to reinstall the Apple Mobile Device USB driver:
- Disconnect your device from your computer.
- Unlock your iOS or iPadOS device and go to the Home screen. Then reconnect your device. If iTunes opens, close it.
- Click and hold (or right-click) the Start button, then choose Device Manager.
- Locate and expand the Portable Devices section.
- Look for your connected device (such as Apple iPhone), then right-click on the device name and choose Update driver.
- Select 'Search automatically for updated driver software.'
- After the software installs, go to Settings > Update & Security > Windows Update and verify that no other updates are available.
- Open iTunes.
If you downloaded iTunes from Apple
Follow these steps to reinstall the Apple Mobile Device USB driver:
- Disconnect your device from your computer.
- Unlock your iOS or iPadOS device and go to the Home screen. Then reconnect your device. If iTunes opens, close it.
- Press the Windows and R key on your keyboard to open the Run command.
- In the Run window, enter:
%ProgramFiles%Common FilesAppleMobile Device SupportDrivers
- Click OK.
- Right-click on the
usbaapl64.inf
orusbaapl.inf
file and choose Install.
You might see other files that start withusbaapl64
orusbaapl
. Make sure to install the file that ends in .inf. If you're not sure which file to install, right-click a blank area in the File Explorer Window, click View, then click Details to find the correct file type. You want to install the Setup Information file. - Disconnect your device from your computer, then restart your computer.
- Reconnect your device and open iTunes.
If your device still isn't recognized
Check Device Manager to see if the Apple Mobile Device USB driver is installed. Follow these steps to open Device Manager:
- Press the Windows and R key on your keyboard to open the Run command.
- In the Run window, enter
devmgmt.msc
, then click OK. Device Manager should open. - Locate and expand the Universal Serial Bus controllers section.
- Look for the Apple Mobile Device USB driver.
If you don't see the Apple Mobile Device USB Driver or you see Unknown Device:
- Connect your device to your computer with a different USB cable.
- Connect your device to a different computer. If you have the same issue on another computer, contact Apple Support.
If you see the Apple Mobile Device USB driver with an error symbol:
How to open microsoft on mac. If you see , , or next to the Apple Mobile Device USB driver, follow these steps:
- Restart the Apple Mobile Device Service.
- Check for and resolve issues with third-party security software, then restart your computer.
- Try to install the
usbaapl64.inf
orusbaapl.inf
file again.
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 port, and each type has a unique shape. On Mac, 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 orientated correctly.
USB-C
Type USB-C ports are available on Mac as standard USB-C ports, Thunderbolt 3 ports and Thunderbolt/USB 4 ports. They all look the same and the connector can be plugged 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 transferPowerdeliveryUSB 4Up to 10 GbpsUp to 15W at 5VUSB 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
Serial number to imei conversion. 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.
Desktop
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 a 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 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 recognise 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 manufacturer of your device, and install all available Apple software updates as well.
- If your device came with an AC power adapter, you should 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, Thunderbolt 3 or Thunderbolt/USB 4 can charge via that port using a compatible USB-C power adapter and cable.