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Sep 21, 2020 • Filed to: Solve Mac Problems • Proven solutions
If a restart does not work, try one of the following five fixes. Check your connectivity. Check the USB port you have been connecting your drive to. If the port is damaged the drive won’t show on your Mac computer. If you are not so sure of the functionality of the port, do a further evaluation to be sure. In the window that appears, see if the USB device is listed below Hardware in the list on the left. If the device appears but does not work, review the device’s documentation for further troubleshooting steps. Restart apps: Quit and restart any apps that use the device. Restart your Mac: Choose Apple menu Restart.
Do you own an Apple Mac computer and you noticed after a while that the USB accessories have been disabled? Don’t be perturbed because in this article we will show you how to enable USB accessories and get it working again.
If USB accessories are disabled, you will no longer be able to access saved data in your flash drive. A disabled accessory may be caused by an ignorant mistake on your part or a system malfunction. Regardless of whose fault it is, a disabled accessory won’t serve your interest in any way. Bearing this in mind, with the aid of the system management controller (SMC) you can enable USB accessories in your Mac computer once again.
About the SMC does and Why You Need IT?
Here are some of the functions performed by the SMC
- Activating power button when pressed
- Responds to opening and closing lids in MC notebooks
- Manages battery power
- Thermal management
- SMS (Sudden Motion Sensor)
- Light sensing (Ambient)
- Keyboard backlight
- SIL (Status indicator management)
- Video external source selector
How so you know when you need an SMC reset?
- When your Mac computer operating system is running at a very high speed even when it is not performing many tasks at once
- Inconsistent keyboard backlight
- Inconsistent indicator light
- Unresponsive ambient light
- When it doesn’t respond to closings and openings
- Unexpected sleep or shutdown modes
- Improper charge
- Slow response to commands
- Failing to recognize the external drive
- Doesn’t respond when you press the power button
Before you reset the SMC
Before you decide to reset your Max system to resolve a disabled USB accessory try all these steps first
- Press down the power until it shuts down
- Tap the command option then the Escape option to quit unresponsive applications
- Put Mac in sleep mode by clicking the Apple menu then click sleep. Once the system is asleep wake it up again
- Restart Mac by clicking Apple Menu
- Shut down Mac by clicking Apple menu then tap the power button again to switch it back on
If Mac is having Power issues follow these simple steps
- Unplug adapter for a minute then plug it again
- Click Apple menu to shut down
- After shutdown remove battery then re-insert it again
- Press the power button to turn the power back on again
If the accessory is still not enabled you may need to reset the system. Apple el capitan download dmg. Follow these steps
Reset on MacBook notebooks
To reset Macbook, check if the battery can be removed. If the battery can’t be removed just
- Click Apple menu and shut the system down
- After the shutdown holds down the Shift + control option on the built-in keyboard and presses the power button at the same time. Hold all keys for 10 seconds. If your Macbook is a Pro the touch ID is also the power button.
- Release keys held down
- Press power key to turn Mac on again
If the battery is removable Ubar 4 0 9.
- Shut system down
- Remove the battery
- Hold down the power key for about 5 seconds
- Fix battery back
- Press power key to turn the system back on
If the failed USB accessory is the USB port, you can also get the solutions to USB Port issues on Mac.
How to reset Mac desktop computers SMC
For Mac Pro, Mini, Xserve, and iMac follow these steps
- Click menu then shut down
- With for a few seconds
- Plug cable back to a power source
- Wait for some seconds then press the power key
If your system is an Xserve computer and it has failed to respond shut it down using commands.
How to reset SMC in Macs with Apple T2 Security Chip
- Click Menu then shut down
- After shut down hold down power for 10 seconds
- Release the button and wait for some seconds
- Press power key again to turn Mac back on
If this doesn’t work do this
- Choose menu then shut down
- Unplug power cable
- Wait for some seconds
- Plug cable back to a power source
- Wait for five seconds then switch Mac on
Mac notebook with the T2 chip
- Choose the menu and shut down
- After shutting down the press and hold the power key for about 10 seconds
- Release the key and wait for some few seconds
- Press power key to time Mac on
Usb Not Working Virus
Top mp3 editing software. If this step does not work follow these steps
- Choose the menu and shut Mac down
- After shutdown press, the Shift key left option key and left control key. Hold them down for 7 seconds. While these keys are held down hold down the power key for 7 seconds also
- Release all keys at once. Wait for a while
- Press the power button to turn Mac on
All the steps listed are very effective tips you can use to enable your USB Accessories on your Max Computer. It may take you some time but try to follow all the steps just as they are listed and you can be sure that your Mac system will work as well as before again.
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Troubleshooting the device:
1. Make sure connection to the USB port is secure
Unplug the affected device from the USB port and then plug it back in. Make sure that the connection is secure.
2. Unplugging other devices that's plugged into the USB ports
For troubleshooting purposes, unplug all USB accessories from the computer. Then start plugging in USB devices one at a time, testing each one to make sure they all work before adding the next. Sometimes two devices will have a conflict and won't work together. If you find this to be the case, contact the manufacturer for assistance.
3. Is it a new device, or a device that stopped working?
Ask yourself, is this a new device that never worked, or is it a device that you've had for a while that suddenly stopped working? If it used to work, think about what changed just before the device stopped working. Did you recently add another new device? Install a new program? Try reverting the computer to the way it was before the device stopped working. If it works again, there is an incompatibility with the device and whatever you added.
4. Check in the System Profiler
Open System Profiler from the Utilities folder, which is inside the Applications folder. From the Contents column on the left, under the Hardware header, select USB; the panel to the right will show all the USB devices that the computer recognizes. It may not identify them correctly by name, but it should have the right number of devices listed.
- If the device shows up in System Profiler, even if the device doesn't work, the issue is usually due to software. Your best solution is to try updating the drivers, creating a new user, or reinstalling the system software.
- If the device doesn't show up in System Profiler, the issue is more likely to be hardware—either the device or the USB port isn't working properly. In this event, continue on to the next item on this list. With each of the following items, check the System Profiler window (press Command-R to refresh the list) to see if the device appears.
5. USB port lacks power
If you have the device plugged into a USB hub or into your keyboard, plug it directly into one of the USB ports on the computer. If it works there, the issue is with the device to which it had been previously connected. The device may need more power than the port provides.
6. Not all USB ports in the computer are working
Check the device in all the USB ports on the computer. Also test each port using a good, working USB device. Sometimes one port on the computer will stop functioning, but others will still work. If this is the case, the computer may need to be serviced.
7. Does the device have a power cord?
Does the affected device have a power cord? If it does, try unplugging and replugging it. Make sure it's plugged into a working power outlet (you can test the outlet by plugging in a lamp or clock).
8. Check if the device is properly mounted:
1. Open Hard Disk > Applications > Utilities > Disk Utility.
2. Highlight the name of your device, if it shows Mount on top, click Mount so that it changes to Unmount.
1. Make sure connection to the USB port is secure
Unplug the affected device from the USB port and then plug it back in. Make sure that the connection is secure.
2. Unplugging other devices that's plugged into the USB ports
For troubleshooting purposes, unplug all USB accessories from the computer. Then start plugging in USB devices one at a time, testing each one to make sure they all work before adding the next. Sometimes two devices will have a conflict and won't work together. If you find this to be the case, contact the manufacturer for assistance.
3. Is it a new device, or a device that stopped working?
Ask yourself, is this a new device that never worked, or is it a device that you've had for a while that suddenly stopped working? If it used to work, think about what changed just before the device stopped working. Did you recently add another new device? Install a new program? Try reverting the computer to the way it was before the device stopped working. If it works again, there is an incompatibility with the device and whatever you added.
4. Check in the System Profiler
Open System Profiler from the Utilities folder, which is inside the Applications folder. From the Contents column on the left, under the Hardware header, select USB; the panel to the right will show all the USB devices that the computer recognizes. It may not identify them correctly by name, but it should have the right number of devices listed.
- If the device shows up in System Profiler, even if the device doesn't work, the issue is usually due to software. Your best solution is to try updating the drivers, creating a new user, or reinstalling the system software.
- If the device doesn't show up in System Profiler, the issue is more likely to be hardware—either the device or the USB port isn't working properly. In this event, continue on to the next item on this list. With each of the following items, check the System Profiler window (press Command-R to refresh the list) to see if the device appears.
5. USB port lacks power
If you have the device plugged into a USB hub or into your keyboard, plug it directly into one of the USB ports on the computer. If it works there, the issue is with the device to which it had been previously connected. The device may need more power than the port provides.
6. Not all USB ports in the computer are working
Check the device in all the USB ports on the computer. Also test each port using a good, working USB device. Sometimes one port on the computer will stop functioning, but others will still work. If this is the case, the computer may need to be serviced.
7. Does the device have a power cord?
Does the affected device have a power cord? If it does, try unplugging and replugging it. Make sure it's plugged into a working power outlet (you can test the outlet by plugging in a lamp or clock).
8. Check if the device is properly mounted:
1. Open Hard Disk > Applications > Utilities > Disk Utility.
2. Highlight the name of your device, if it shows Mount on top, click Mount so that it changes to Unmount.