Wireless devices using the Unifying Receiver are supported since Linux 3.2. Pairing software is available from Logitech for Microsoft Windows and Mac OS X. Newer devices can switch pairings an unlimited number of times. Logitech advises customers with this issue to contact their Customer Care. at work and home) will quickly exhaust the limit of available pairing switches. For example, a user who frequently switches a mouse between two receivers (e.g. For users who often switch a Unifying device between multiple PCs or laptops with individual receivers, this connection limit can become an issue. Once the 45th connection is made, it is no longer possible to connect such a device to a different receiver. Some older Unifying devices limit the number of allowable pairing changes to a maximum of 45 times. devices supporting USB OTG with operating systems such as Android: first pair to the receiver on a PC or Mac. This also allows the use of peripherals on computing devices that do not support Unifying Software, e.g. For devices without multi-computer support, the receiver and input devices can be moved together from one computer to another, maintaining their paired status after being unplugged, as the pairing information is held in the little USB receiver -this is much simpler than transferring the peripheral from one receiver to another by changing the setup in software, and also avoids the limitation to 45 pairings of older devices. This multi-computer function is further augmented by Logitech Flow (software KVM solution) which is similar to Synergy. This allows the use of receivers in several computers, e.g., a desktop and a laptop computer, selecting the computer to use by changing profiles on the mouse. These devices can be connected to multiple receivers simultaneously. While most peripherals only store one profile, newer products such as the Logitech MX Master, MX Anywhere series, and M720 Triathlon allow multiple profiles. Compatibility and use Įach peripheral device can pair to one receiver per profile. Some Logitech peripherals allow a receiver to be stored inside. Logitech Unifying receivers (LURs) are often included in wireless Logitech keyboard, mouse, and combo sets, and may be purchased separately. Logitech receivers compatible with the Unifying protocol can be identified by the orange Unifying logo, which distinguishes them from Logitech Nano receivers of similar appearance, which pair in a similar manner but only with a single device, without using the Unifying protocol. Peripherals remain paired, and can then be used on systems not supporting the software. Although not compatible with Bluetooth, devices pair to Unifying Receivers in a similar way. On Linux the Solaar software can be used to adjust the configurations. When purchasing a replacement receiver or connecting multiple devices to one receiver, pairing requires the free-of-charge Logitech Unifying software, available for Microsoft Windows and Mac OS X. Receivers that are bundled with a Logitech product are paired with the device at the factory. You can also look for a visual tutorial of this on youtube / google.Īs these age, this is, sadly, a widespread problem with the Logitech receiver.The Logitech Unifying receiver is a small dedicated USB wireless receiver, based on the nRF24L-family of RF devices, that allows up to six compatible Logitech human interface devices (such as mice, trackballs, touchpads, and keyboards headphones are not compatible) to be linked to the same computer using 2.4 GHz band radio communication. Once the chip and the USB port are properly touching again you will see the receiver show up in the Mac Systems USB panel and in Logitech Control Center, as others pointed out. The fix is to remove the black cover, remove the chip, insert a piece of paper that raises the metal connectors of the chip closer to your laptop's USB connector. Once you’re sure the Logitech dongle is not working, here is a DIY repair you could try if you can’t get a repair / replacement part: You should see that device be listed and know your Mac and USB are fine. You can confirm this by removing logitech, then plugging in another usb mouse or something and refreshing the System Information. The drivers are probably fine but idle since they don’t see the USB hardware for Logitech. The system information is showing that the hardware is not being detected.
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