USB port types and names
Mac office 2019. 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, 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. How to bypass admin password mac.
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USB-C
Make sure your Mac is connected to the external storage device (for example, using a USB cable or over a network). Click the Finder icon in the Dock to open a Finder window, then do one of the following to move your files. The simplest way to format a USB on macOS is through the Disk Utility. First, plug your USB drive into your Mac. Depending on which Mac you're using, you may need to use a flash drive that has a USB C socket or an adapter from USB A to USB C. Once your USB drive is plugged into your Mac, open Finder. You should see the drive in the sidebar. Restart your Mac Sometimes a simple restart can resolve issues. From the Apple menu, choose Restart to restart your computer. Once your Mac is finished starting up, test your device again. Check the software See if a newer version of software is available for your device if it requires software. Visit the product manufacturer's website.
If your external hard drive icon is not appearing on your desktop you can easily retrieve via the Finder Preferences. Click on your desktop or the Finder icon in your dock to bring the Finder to the front of your screen.
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.
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 transferPower deliveryUSB 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
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, Thunderbolt 3, or Thunderbolt / USB 4 can charge over that port using a compatible USB-C power adapter and cable.
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It sounds like you are not able to use your USB ports on your computer. I would use the troubleshooting in the following article to help resolve that, named:
It sounds like you are not able to use your USB ports on your computer. I would use the troubleshooting in the following article to help resolve that, named:
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- Restart your Mac
Sometimes a simple restart can resolve issues. From the Apple menu, choose Restart to restart your computer. Once your Mac is finished starting up, test your device again. - Check the software
See if a newer version of software is available for your device if it requires software. Visit the product manufacturer's website. - Check your device's power
Make sure that your device is on if it has a power switch; try turning your device off and then on again. - Try a different port and cable
Connect your device to a different USB or FireWire port on your Mac. If you connected your device to a USB or FireWire hub or to a port on another USB or FireWire device that's connected to your Mac (known as daisy chaining), connect your device directly to a port on your computer. Some devices need to draw power from a USB or FireWire port to work; if you connect a device to a non-powered hub (one that isn't plugged in to a power source) or to a low-power port (such as the one on your USB keyboard), it may not work. If you have another known-good cable, try swapping the cable to see if that works. If it does, you should replace the problematic cable. - Check for device conflicts
Disconnect all USB or FireWire devices (including hubs and extension cables) except for your Apple keyboard and mouse. Then, connect the device in question directly to your computer. If your device works now, there may be a conflict between that device and one of your other USB or FireWire devices. If it doesn't work, go to tip 8. If you do have a conflict, you can determine which devices are affected. Connect your other devices to your Mac, one by one, making sure to test that each device works before making another connection. When you find the device that causes the issue, contact the manufacturer for assistance (check both manufacturers' websites for software updates and additional information). - Quit associated applications
If you're using a particular application that uses the device in question (for example, you're using Image Capture with a USB scanner), try quitting the application and then opening it again. - Try another user account or computer
If you have another Mac available, try connecting your device to that other computer to see if it works. If you don't have another computer available, log in to another user account on your Mac (or create a new user account and log in to it), and test the device again. If the device is working now, there may be a software conflict between the device and something in your original user account. - Check System Profiler for hardware Issues
Open System Profiler (from the Apple menu, choose About This Mac, then click More Info) and then click either USB or FireWire. If you don't see your device listed in the pane, the issue could be with the device itself or your computer's USB or FireWire port. To rule out the port, plug the device into another USB or FireWire port on your Mac and then check System Profiler again (press Command-R to refresh the window). Also try resetting the FireWire bus. If you see your device listed in the pane but it doesn't work, you may want to contact the device's manufacturer for assistance.
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