1. Usb Mouse Not Working Windows Xp Sp2
2. Mac Usb Keyboard Not Working
3. Microsoft Wireless Mouse Not Working
4. Microsoft Usb Mouse Not Working

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Before we get into the software fixes, let’s start with the simplest solution of all: restarting your Mac. Switch the Mac off and back on again. You’ll be surprised at how many problems a quick restart solves.

Next, check the USB device. There’s a chance that it could have failed, particularly so if you’re using a cheaper cable. Inspect the device visually, looking for damage to the connector and any signs of frayed wiring. If there is no apparent damage, take two different USB devices and test them against different ports. If the devices aren’t working on one or all of the ports it’s more likely to be an issue with your Mac and not the device.

A USB device that works on one port but not another is a sign of a faulty port. If this is the case, the only real solution is to contact an authorized Mac specialist for a hardware diagnostics test and have the port repaired.

If the device doesn’t work in any of your ports, then continue reading for some potential fixes.

What to do if Mac USB devices are not working

All of your Mac or MacBook USBs not working is actually better news than one failing. It’s unlikely that all of your ports would fail at once which means the fix is probably an easy one.

Here are three things to try, starting with the most common fix.

1. Reset the SMC

Resetting the SMC (System Management Controller) is a simple fix that cures a wide range of hardware issues. How this is done depends on whether you’re using a MacBook or Mac desktop.

Resetting the SMC on a MacBook

1. Shutdown your MacBook.
2. Connect the power adapter.
3. Hold Shift+Control+Option and the Power button at the same time.
4. Release all the keys at the same time.
5. Let your MacBook boot up as usual and the SMC will be reset.

Resetting the SMC on an iMac, Mac mini, or Mac Pro

1. Shut down your Mac.
2. Disconnect the power cord.
3. Press and hold the Power button for 5 seconds and release.
4. Reconnect the power cord and switch the Mac back on.

2. Check for updates

Outdated firmware and software results in various hardware issues, including.. Yep — Mac USB ports not working.

Check for system updates by opening the App Store and clicking on the Updates tab. If updates are available, click on the Update button next to each application that you want to install.

Usb Mouse Not Working Windows Xp Sp2

3. Reset PRAM/NVRAM

The PRAM (Parameter RAM) and NVRAM (Non-Volatile RAM) hold information about various USB components. Resetting them could be the solution to your USB woes.

It’s a slightly different process to resetting the SMC, but no less difficult.

1. Shutdown your Mac.
2. Restart it, holding down Command+Option (ALT)+P+R as you do.
3. Hold down the keys until you hear a sound and see the screen flash.
4. Listen for the chime sound and let the Mac boot up as usual.

4. Uninstall potentially conflicting apps

If the USB ports not working on your MacBook Pro or iMac is a recent issue and there doesn’t seem to be any problem with USB devices, it could be that an app is conflicting with USB functionality. If you’ve downloaded an app from an unknown source there is the potential for it to contain malware, which could also be the cause of the problem.

In any case, it’s worth uninstalling recently downloaded and installed apps. If they aren't the reason for the USB ports acting up, you can easily reinstall them from the App Store.

One way to remove apps is to use Launchpad or Finder. Or you can use a quicker, more effective method: CleanMyMac X.

Mac Usb Keyboard Not Working

To completely remove an app and every file associated with that app, use CleanMyMac.

CleanMyMac’s Uninstaller tool scans your entire system for every trace of an app and completely removes it. Using the tool is every bit as easy as deleting an app manually.

1. Download and launch CleanMyMac (free download).
2. Click on Uninstaller from the sidebar menu.
3. Select the app that you want to remove from the list.
4. Click Complete Removal in the Smart Selector panel.
5. Hit Uninstall.

While CleanMyMac lets you uninstall apps in bulk, in this case, you should delete apps one at a time until you find the culprit. CleanMyMac also lets you clean up unwanted junk, declutter your Mac and improve performance.

One way to uninstall apps manually is by using the Launchpad:

1. Open the Launchpad.
2. Find the app that you want to remove and click and hold the icon until it starts to jiggle.
3. Click on the X that appears in the corner of the app, then click Delete.

You can also uninstall apps from the Finder:

1. Open the Finder and go to Applications.
2. Find the app that you want to remove and drag its icon to the Trash (you might need to enter your admin credentials to confirm you want to delete the app).
3. Click on the Trash icon and select Empty Trash.

Having one or more USB ports not working on your Mac can be hugely frustrating, especially if you rely on those ports for data backup and external peripherals. That said, USB problems are quite rare and are usually easy to fix. Work your way through these troubleshooting tips until you find the one that works and restore your Mac to its full glory.

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Your device isn't recognized by your Mac

Follow these steps if your mouse, keyboard, or trackpad isn't recognized by your Mac.

Make sure that your wireless mouse, keyboard, or trackpad is turned on

The Magic Mouse and Magic Mouse 2 have a slide switch on the bottom of the device. Slide the switch to turn on the device. On the Magic Mouse, the green LED briefly lights up. On the Magic Mouse 2, green coloring is visible beneath the switch.

The Magic Keyboard, Magic Keyboard with Numeric Keypad, and Magic Trackpad 2 have a slide switch on the back edge of the device. Slide the switch to turn on the device (green coloring becomes visible). Earlier Apple Wireless Keyboard models have a power button on the right side of the device. Press the button and you see a green LED on the top of the device, near the button.

When you turn these devices on, they appear as Connected in the Bluetooth section of System Preferences and in the Bluetooth menu in your menu bar. If a device doesn't appear there, make sure it's charged or replace it batteries, and make sure it's been paired with your Mac.

Make sure that your device has been set up to work with your Mac

Learn how to pair your Magic Mouse 2, Magic Keyboard, Magic Keyboard with Numeric Keypad, Magic Trackpad 2—and earlier models of Apple wireless devices—with your Mac.

Make sure that Bluetooth is turned on

Use your Mac notebook's built-in trackpad or a USB mouse to choose Apple () menu > System Preferences. Then select Bluetooth and make sure that Bluetooth is turned on.

Refer to the table below for more information on determining the Bluetooth status. If the Bluetooth icon doesn't appear, or if the menu bar status continues to indicate that Bluetooth is off, restart your computer and then try to turn Bluetooth on again.

Make sure that your devices are charged

Magic Mouse 2, Magic Keyboard, Magic Keyboard with Numeric Keypad, and Magic Trackpad 2 have built-in rechargeable batteries. You can charge these devices by connecting them to a Mac or a USB power adapter using a Lightning to USB Cable. For the fastest battery charging performance, be sure your device is switched on when connected to the Lightning to USB Cable.

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To check the battery level of these devices, click the Bluetooth icon in your Mac's menu bar, then select your device by name. If the battery level of any device is low, recharge the device. If the device isn’t showing, make sure the device is turned using the steps outlined above.

Turn the device off and on

If your Apple wireless mouse, keyboard, or trackpad isn't recognized by your Mac after following the tips above, try turning the wireless device off, waiting a few seconds, and then turning it back on.

Your mouse or keyboard intermittently stops responding

Follow these steps if your mouse or keyboard sometimes stops responding temporarily.

Click or press a key

• Click the mouse or trackpad or press a key on the keyboard to reconnect the device to the computer. It might take a moment for the device to respond.

Check for signal interference

• Wireless networks that operate on 2.4GHz may cause interference. Move cordless phone base stations, microwave ovens, and other 2.4GHz electrical devices away from your Mac if you suspect interference.
• Keep wireless devices within 10 meters (approximately 30 feet) of your Mac.
• Avoid putting metal objects between your wireless device and your Mac.

Your mouse doesn't scroll up or down or side to side

If you can't use your mouse to scroll through a web page or document, see Mac Basics: Multi-Touch gestures to make sure your Gestures are configured correctly. You can also try adjusting your scrolling speed preferences.

Your mouse or trackpad doesn't track as expected

Apple Wireless Mouse, Magic Mouse, and Magic Mouse 2 can be used on most smooth surfaces. If tracking issues occur, try these options:

• Choose Apple menu > System Preferences, then select Mouse. Set the Tracking slider to adjust how fast the pointer moves as you move the mouse.
• Try using a different surface to see if the tracking improves.
• Turn the mouse over and inspect the sensor window. Use compressed air to gently clean the sensor window if dust or debris is present.
• If multiple Bluetooth wireless devices are in use nearby, try turning them off one at a time to see if the issue improves. Bandwidth intensive devices can affect tracking.

Learn more about what to do if your trackpad isn't tracking correctly.

Your keyboard has one or more keys that don't respond

Use the Keyboard Viewer to test whether the keyboard keys are responding correctly when they are pressed.

1. Choose Apple menu > System Preferences, then select Language & Region.
2. Click the Keyboard Preferences button.
3. Click on the Input Sources tab.
4. Make sure that the keyboard language that you use is listed on the left side. If it's not, click and choose from the languages that appear.
5. Select the checkbox next to Show Input menu in menu bar.
6. Click on the Keyboard tab, then select the checkbox next to Show keyboard and emoji viewers in menu bar.
7. Choose Show Keyboard Viewer from the Input menu in the menu bar. The Keyboard Viewer showing the keyboard layout appears on your display.
8. Type the key on the keyboard that doesn’t respond and see if the corresponding key highlights on the Keyboard Viewer. If it does, that key is functioning correctly.

If you enable the Mouse Keys feature, many keys might not respond as you expect. Here's how to turn off Mouse Keys:

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• In OS X 10.8 or later, choose Apple menu > System Preferences. Click on Accessibility, then choose Mouse & Trackpad from the list on the left side. Then deselect the Enable Mouse Keys checkbox.
• In OS X 10.7.5 or earlier, choose Apple menu > System Preferences. Click on Universal Access, then select the Mouse & Trackpad tab. Then select the Off button next to Mouse Keys.

Microsoft Usb Mouse Not Working

If issues with keys persist, try starting up your Mac in single-user mode to see whether a software issue is causing the problem.