Best answer: The USB dongle that came with your M705 mouse is a Logitech Unifying receiver that will also support the K750 keyboard on the same dongle. All you'll need to do is download the free Logitech Options software and you'll find an option to connect a new device to your USB Unifying.

1. Logitech K750 Replacement Unifying Software Mac Free
2. Logitech K750 Replacement Unifying Software Mac Osx
3. Connect Logitech K750 Keyboard To Mac

The Logitech Unifying receiver is an extremely small dedicated USB wireless receiver, based on the nRF24L-family of RF devices,^[1] that allows up to six compatible Logitech human interface devices (such as mice, trackballs, trackpads, and keyboards; headphones are not compatible) to be linked to the same computer using 2.4 GHz band radio communication. Receivers that are bundled with a Logitech product are paired with the device at the factory. 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. Although not compatible with Bluetooth, devices pair to Unifying Receivers in a similar way.^[2] Peripherals remain paired, and can then be used on systems not supporting the software. 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.

Logitech Unifying receivers (LURs) are often included in wireless Logitech keyboard, mouse, and combo sets, and may be purchased separately. Some Logitech peripherals allow a receiver to be stored inside.^[3]

As of October 2019 Logitech Unifying Software for Windows had last been updated, to version 2.50.25, on 30 March 2010.^[4]

Compatibility and use[edit]

Each peripheral device can pair to one receiver per profile. While most peripherals only store one profile, newer products such as the Logitech MX Master, MX Anywhere series, and M720 Triathlon allow multiple profiles. These devices can be connected to multiple receivers simultaneously. This allows the use of receivers in several computers, e.g., a desktop and a laptopcomputer, selecting the computer to use by changing profiles on the mouse. This multi-computer function is further augmented by Logitech Flow (software KVM solution) which is similar to Synergy. 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^[2]—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 also allows the use of peripherals on computing devices that do not support Unifying Software, e.g. devices supporting USB OTG with operating systems such as Android: first pair to the receiver on a PC or Mac.^[5]

Some older Unifying devices limit the number of allowable pairing changes to a maximum of 45 times. Once the 45th connection is made, it is no longer possible to connect such a device to a different receiver. For users who often switch a Unifying device between multiple PCs or laptops with individual receivers, this connection limit can become an issue. For example, a user who frequently switches a mouse between two receivers (e.g. at work and home) will quickly exhaust the limit of available pairing switches.^[6] Logitech advises customers with this issue to contact their Customer Care. Newer devices can switch pairings an unlimited number of times.

Pairing software is available from Logitech for Microsoft Windows and Mac OS X. Wireless devices using the Unifying Receiver are supported since Linux 3.2.^[7]Software to manage Unifying devices on Linux is available from third party developers, such as Solaar.^[8]

Many companies have made peripherals that connect via USB wireless receivers very similar to Logitech's; Logitech devices are incompatible with many of these 'off-brand' receivers^{[citation needed]}.

Security[edit]

Several security vulnerabilities of the Logitech Unifying system have been reported in 2016 and 2019,^[9] and patches released.

MouseJacking and keyjacking[edit]

MouseJacking, first reported by Bastille Networks, Inc.,^[9] is the sending of malicious radio signals (packets) wirelessly to an unsuspecting user through Logitech Unifying wireless technology. The exploit takes advantage of a user's vulnerable Logitech Unifying receiver and unencrypted signals within a range of about 100 meters. Possible exploits include:

• Keystroke injection by either spoofing a paired mouse or keyboard
• Forced pairing

Affected devices and firmware[edit]

Firmware not affected[edit]

Response[edit]

Logitech has released Unifying receiver firmware updates as new exploits were reported.^[15][16]

For Linux users there are native options to flash and experiment with such as fwupd and MouseJack.^[1] However, with these tools a separate firmware binary is still required. Flashing on a Linux host via a hypervisor such as VirtualBox along with a Windows virtual guest image and the Windows Logitech update executable is also possible. If using a Windows virtual guest, it is recommended to have a second available pointing device while the dongle is being updated. The second pointing device may be needed to allow the user to select and enable pass through of the unifying receiver via the hypervisor task bar after executing the firmware updater so that the device is found and updated.

Updating the Unifying receiver firmware to versions RQR12.08 or greater and RQR24.06 or greater can limit some functionality of certain paired devices unless the devices' firmware is also updated.

Other vulnerabilities[edit]

On July 9, 2019 another set of vulnerabilities was disclosed and documented by a different researcher.^[9] A firmware update for Unifying receivers addressing the 'Encryption Key Extraction Through USB' vulnerability (CVE-2019-13054/55) was released on 28 August 2019.^[16] Some users reported in 2019 that some Unifying devices are still being sold that are vulnerable to the original 2016 MouseJacking attack.^[17]

See also[edit]

References[edit]

1. ^ ^abNewlin, Marc (2016-08-07). 'MouseJack device discovery and research tools'. Retrieved 2019-07-25.
2. ^ ^abGallegos, Gary. 'Gadgets: The Logitech Unifying Receiver (aka 'fake bluetooth')'. Archived from the original on 4 March 2016.
3. ^'Logitech Unifying Multi-Connect Utility Setup Instructions'(PDF). Logitech.
4. ^'Logitech Unifying Software'. Logitech Support + Download. Retrieved 3 October 2019.
5. ^'Android Tablets and Logitech Unifying Devices'. Music Tribe. 7 January 2018.
6. ^'Limitations on Unifying devices'. Archived from the original on 2019-07-10. Retrieved 2019-07-25.
7. ^Nestor Lopez Casado (2011-09-15). 'HID: Add full support for Logitech Unifying receivers'. Linux kernel. Retrieved 2019-07-25.
8. ^Solaar on GitHub
9. ^ ^abcmame82 (2019-07-09). 'Summary / Overview of known Logitech wireless peripheral vulnerabilities'. Retrieved 2019-07-25.
10. ^ ^abcdef'MouseJack Affected Devices'. Bastille Networks. Retrieved 2019-07-25.
11. ^ ^abcdefViredaz, Marc (2017-12-22). 'RQR12.08 Build 0030'. Retrieved 2019-07-25.
12. ^ ^abcdViredaz, Marc (2017-12-22). 'RQR24.06 Build 0030'. Retrieved 2019-07-25.
13. ^Viredaz, Marc (2017-12-22). 'RQR12.09 Build 0030'. Retrieved 2019-07-25.
14. ^Viredaz, Marc (2017-12-22). 'RQR24.07 Build 0030'. Retrieved 2019-07-25.
15. ^LogiLaurie (2016-07-28). 'Logitech Response to Research Findings'. Archived from the original on 2019-07-09. Retrieved 2019-07-25.
16. ^ ^ab'Logitech Unifying Receiver Update'. Logitech Support + Download. 28 August 2019.
17. ^Hollister, Sean (2019-07-14). 'Why you should really, really update your Logitech wireless dongle'. The Verge. Retrieved 2020-01-02.

External links[edit]

• Solaar on GitHub - Linux devices manager for the Logitech Unifying Receiver

I’ve recently bought a new Logitech K360 keyboard for my HP Z600 workstation. I also had a Logitech M325 mouse, both of which came with Unifying USB receivers. I could plug both receivers in, and both devices would work great.

However, I heard great things about these little receivers and wanted to free up a USB port, and thought I’d connect both devices to the same receiver. Apparently you can connect up to 6 devices to one receiver and store any spare ones inside the mouse or keyboard. Being an all-efficient belt-and-braces kinda guy, I tried my luck.

Turns out it was relatively easy to pair both devices to the same receiver, thanks to a small piece of software that can be found here, along with instructions on how to use it:

It all worked fine on my Windows 10 machine, until I wanted to use the mouse (not the keyboard) with my Mac. I know, it’s exotic, and perhaps I should have just bought another mouse. But really, there’s only so much space on my desk, and I really don’t need more clutter in front of me for just an occasional switch.

I regretted pairing both devices to the same receiver and wished I hadn’t done that, for this very eventuality. So now I had to figure out how to UN-pair both devices again and put them back to how things used to be (before I started messing with them).

The Trouble I encountered

The good news was that when I used the original mouse receiver on my Mac, with my Windows PC switched off, everything worked just fine. It was as if nothing had ever happened. I was happy, modelling things in Blender (which is a little cumbersome with a Mac trackpad, or perhaps I’m just not used to it anymore). And even when I switched on my Windows PC, the mouse was still working on the Mac.

The trouble was the keyboard was no longer detected on the Windows machine.

Logitech K750 Replacement Unifying Software Mac Free

So I plugged the mouse USB receiver into the Windows machine too, and now NOTHING was working anymore – neither in Windows nor on Mac. It was as if I had two dead devices on my desk. The light on the mouse still came on, but the light on the keyboard (usually comes on when you press CAPS LOCK) was also dead. I couldn’t access the Windows machine anymore either – so how was I going to start the Logitech software to repair this mess?

Lucky for me, I had setup a VNC connection to my Z600, so I just logged in from my Mac and at least got control of Windows that way. Always good to have that in place! I launched the Logitech software and followed the instructions… but none of the two USB receivers were detected. What a bummer!

The Solution: Un-pairing those devices again

With nowhere else to turn, I contacted Logitech Chat Support. And while I was waiting for the agent to reply, I tried the following. This made everything OK again:

Logitech K750 Replacement Unifying Software Mac Osx

• shutdown Windows (so that the computer is off)
• switch off both devices
• unplug one receiver, leave the other one in place
• restart Windows
• start the Logitech software (and follow the instructions)
• switch on ONE device – this should complete the pairing for this device/receiver
• switch OFF that device and unplug the corresponding receiver
• plugin the next receiver and start the Logitech software
• switch on the SECOND device (and follow the instructions)
• move the mouse if you’re told to do so
• this completes the pairing for the second device/receiver

Now each device is paired to its own receiver again. I can now unplug the mouse receiver and use it in my Mac, and when I’m done I can plug it back into the Windows machine and use the mouse there. They keyboard is at all times unaffected and can also be unplugged – for use with another computer. Awesome!

It’s a good idea to mark the receivers so that you know which one is which: in my case, I bought the mouse before Logitech had the big bad Logo Redesign idea, so both my mouse and its receiver have the old Logitech logo, and the keyboard and its receiver have the new logo. With this setup, the devices behave more like “wired” devices. Comes in handy if you administer multiple machines in your office.

What Logitech support told me

Here’s a valuable list I haven’t found online, straight from a very nice Logitech chat support agent:

• Check or try new batteries. Make sure that the batteries is within the manufacturers date.
• Re-seat to another USB port. Bypass the use of KVM switch boxes, port replicators, docking stations, and USB hubs if any. Prefer using USB 2.0 rather than USB 3.0 ports.
• Reload your drivers
• Un pair repair using Unifying Software:

1. Download the Unifying Software on your computer http://support.logitech.com/en_us/product/6254
2. Once downloaded you will see the Logitech Unifying Software Welcome Screen (Plug it. Forget it. Add to it.)
3. Go to Advance click the name of the device>(device).
4. Select Un-pair
5. Your device will completely lost connection after unpaired.
6. Then close the unifying system.
7. Then Go back to Advance Select> Pair a New Device. Follow on-screen instructions
8. Check if the device if it’s working properly.

• Please try using the device with a different computer; this will verify if it is a hardware problem (instead of a system/software specific issue).
• Compare the behavior in that PC to how the device works.

Hope this helps anyone who encounters similar issues.

Connect Logitech K750 Keyboard To Mac