Same problem. Still no change. Sure, you may always opt for the manual path. In response to reynoldsdj. Yes, you may have just updated to Catalina, but are you sure you installed the update correctly? In response to Marcjacobharris, ”Just updated to Catalina and my M325 Logitech mouse stopped working immediately.”. Read on below to explore some possible fixes. I'm having the same problem. GunWanderer, Oct 15, 2019 3:48 PM in response to Marcjacobharris, User profile for user: Hi All - I was prompted to update to OS 10.15 this morning and my mouse worked! If you have further inquiry, please do not hesitate to reach back to us or contact our support team for direct assistance. Just restart your Mac Bluetooth connection and check if it resolves the problem. In response to Marcjacobharris. I threw out the prefs from the library, started the mac again and even installed version 7 twice - no change. Same problem here and the solution from OP seemed weird, but tried it anyways and voila it worked! is there a specific way to do this? Deleting an important system file may cause your Mac not to work completely. Same thing, I was prompted an update a few times actually even though I had chosen to update it the first time and despite that, when I had opened it, I was stuck on the loading screen which then led me to try and uninstall it to remedy the problem. Oct 15, 2019 5:21 PM in response to seaworker22 Oct 8, 2019 7:47 PM in response to Marcjacobharris So, have you just updated to Catalina, only to see your Logitech mouse stop working? The current work-around is to hide this window by dragging it to the bottom of the screen, and avoiding clicking on either button. Found good help on the logitech site. You can reach out to them via their website. And the "Logitech firmware update" which recognized the Unifying receiver and reported a successful firmware update. Once the tool is installed, run a quick scan and let Outbyte MacRepair find all the unimportant and unwanted files on your Mac. It worked with my M705. How to Fix a Logitech Mouse Not Working with Catalina. I have the same mouse and it worked after following these steps. The receiver is recognized in the System Information but I am not able to use the mouse or keyboard. After updating the firmware on the Unifying receiver, it's possible to pair the keyboard using the "Advanced" option in the Unifying software. Deleting an important system file may cause your Mac not … Seems Logitech does not have a Firmware Update Tool as of the date of this reply for macOS 10.15 Catalina; . With the release of macOS 10.15 Catalina, 32-bit apps such as MyHarmony will no longer launch and instead display an error message. Less, User profile for user: Using the "Advanced" option....the keyboard is recognized (state goes from inactive to active when you pound on the keys), yet no characters appear either in the Unifying test box or anywhere in the computer itself. Click here to download our new 64-bit app “Harmony Desktop” for Catalina. For users on Linux or Mac, the lack of autoscroll can be a big pain. As I say I don't know if this applies to anyone else but hopefully it may help some people or at least give ideas of other things to try, Andy Vockins: Do you mean to say, you got Flow to work when Hyper-V is active and running a virtual machine? In response to Marcjacobharris. A MouseJack attack allows an attacker to break into a Logitech USB receiver that is connected to a computer. Mine was still 1.3.8, even though it should have updated to 1.3.9. Old MyHarmony software (32-bit) is not supported in Catalina. Make sure it is installed correctly as described here: https://support.logi.com/hc/en-us/community/posts/360036740513-Important-information-for-Logitech-Control-Center-and-macOS-Catalina-Update-LCC-before-installing-macOS-Catalina. This is the first of five systems we own to be converted to Catalina and we are likely to have this issue with allow them. To fix this issue, please try the following steps: - Restart your computer (From the menu bar, click on the Apple logo and select Restart). Then I downloaded and installed Logitech Options. Speed the cursor. See my second edit. If you restart your mac, then your Logitech Bluetooth devices will reconnect. The Logitech keyboard also running off the same dongle has kept working, but the mouse does not. In response to seaworker22. Once that happens, the mouse starts working again. Don’t worry because there are ways to resolve the problem. I'm wondering if the same would be true on the Mac, that is, upgrading OSX somehow messes up the mouse and keyboard Bluetooth/Options links.