Ever since I installed Catalina by Logitech USB mouse and keyboard no longer work. I have the USB receiver connected to the Thunderbolt port using a USB dongle. The receiver is recognized in the System Information but I am not able to use the mouse or keyboard. All the ports including the USB ports and USB controller are integrated into the logic board. So it would mean a complete disassembly, plus a new logic board that cost more than the iMac is worth. As suggested your only options are and if everything else is working, a wireless Keyboard and Mouse, then a FireWire external HD for backup.
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Magic Keyboard, Magic Keyboard with Numeric Keypad, Magic Mouse 2, and Magic Trackpad 2 have a built-in rechargeable battery that lets you use the devices for extended periods between charges.
You can check your device's charge level by choosing its name from the Bluetooth icon in the menu bar at the top of the screen.
When it's time to charge your device's battery, connect a Lightning to USB cable to its Lightning port, then connect the other end of the cable to your Mac or a USB power adapter.
For the fastest battery charging performance, be sure your device is switched on when connecting the Lightning to USB cable.
Magic Keyboard, Magic Keyboard with Numeric Keypad, and Magic Trackpad 2 can be used while charging. Magic Mouse 2 is unavailable for use while charging.
Find the Lightning port on your Apple device
The Lightning port on Magic Keyboard and Magic Keyboard with Numeric Keypad is on the back of the device, in the center:
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![Usb mouse for mac Usb mouse for mac](https://www.applefritter.com/files/iMac%20G3%20Lime.jpg)
The Lightning port on Magic Mouse 2 is on the underside of the device, beneath the text and markings:
The Lightning port on Magic Trackpad 2 is on the back of the device, in the center:
Learn more
- If you have an earlier Apple wireless mouse, keyboard, or trackpad with removable batteries, learn how to install batteries.
- Find out more about the rechargeable batteries in your Apple device at Batteries - Why Lithium-ion?
- Magic Keyboard for iPad doesn't need to charge, because it doesn't have a battery.
Get connected
First, learn how to connect a Bluetooth mouse or trackpad to your iPad. To use this feature, you need an iPad with iPadOS 13.4 or later.
Navigate your iPad
When you connect a Bluetooth mouse or trackpad to your iPad, a circular pointer appears on the display.
Move the mouse or swipe on the trackpad just as you would with a desktop or notebook computer. You can adjust how quickly the pointer moves, along with other trackpad and mouse settings.
As it moves across different elements on the screen, the pointer changes shape. For example, it turns into an I-beam over text, indicating that you can insert the pointer into a text document or highlight and copy words from a webpage:
![Mouse Mouse](https://www.ninetech.com/wp-content/uploads/2019/03/skistar-topp100-1024x551.jpg)
When the pointer hovers over various parts of iPadOS, they also change appearance and use subtle animation to help you navigate. For example, toolbar buttons in apps change color, and app icons on the Home screen get bigger:
The pointer disappears after a few seconds of inactivity. To make it appear again, just move the mouse or touch the trackpad.
iPadOS doesn't support scrolling or other gestures with Apple Magic Mouse (1st generation) or Magic Trackpad (1st generation).
Adjust trackpad settings
To change how your Bluetooth trackpad works, go to Settings > General > Trackpad. On the screen that appears, you can adjust these settings:
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- To adjust how quickly the pointer moves when you use the trackpad, drag the Tracking Speed slider.
- To make content track the movement of your fingers when you scroll, turn on Natural Scrolling.
- To make a tap on the trackpad register as a click, turn on Tap to Click.
- To have a two-finger click or tap behave as a secondary click, turn on Two Finger Secondary Click.
In iPadOS, a secondary trackpad click acts like a long press on the iPad touchscreen, or a Control-click (or right-click) on a Mac. For example, when you use a secondary trackpad click on an iPad app icon, its contextual menu appears.
You can also perform a secondary click on iPad with any pointing device by holding the Control key as you click.
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Adjust mouse settings
To change how your Bluetooth mouse works, go to Settings > General > Trackpad & Mouse. On the screen that appears, you can adjust these settings:
- To adjust how quickly the pointer moves when you use the mouse, drag the Tracking Speed slider.
- To make content track the movement of your fingers when you scroll, turn on Natural Scrolling.
With a mouse, you can also choose a behavior for a secondary click. In iPadOS, a secondary click acts like a long press on the iPad touchscreen, or a Control-click (or right-click) on a Mac. For example, when you use a secondary mouse click on an iPad app icon, its contextual menu appears.
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Select Secondary Click, then choose whether you want a secondary click to happen when you click on the left or right side of your mouse, or not at all. You can also perform a secondary click on iPad with any pointing device by holding the Control key as you click. Http apple com kb ht1222.
Customize the pointer
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To change how the pointer looks and how it works, open the Settings app and tap Accessibility > Pointer Control. There, you can customize these features:
- To make the pointer darker and less transparent, turn on Increase Contrast.
- Tap Automatically Hide Pointer, then select how long you want the pointer to stay visible when it's not moving.
- To select a different color for the pointer, tap Color.
- To make the pointer larger or smaller, drag the Pointer Size slider.
- Turn on or turn off Pointer Animations.
- To adjust how quickly pages scroll when you use your Bluetooth mouse or trackpad, use the Scrolling Speed slider.
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Show and hide the onscreen keyboard
Don't see the onscreen keyboard when you have a trackpad or mouse connected? Tap the keyboard button in the lower-right corner of the screen. In the menu that appears, tap the show keyboard button . To hide the software keyboard, tap the dismiss button .