Hey everyone. As many others I’ve lost my Keyboard and Mouse support after upgrading to Big Sur. Here is the workaround I came up with. It is semi-working. I have to unplug my mouse once in a while and plug it back to get it re-detected. Better than nothing and it is safer alternative to installing 3rd-party solutions which monitor all input. At the end all you do is add Razer TEAMID to list of trusted ones in your Mac OS. https://developer.apple.com/forums/thread/649829?answerId=646433022#646433022 I’ve tried to send this answer to Razer hoping it will get to engineers and they will publish a quick update. But seeing several threads here “locked for violating the rules” when people ask for help... I doubt it will get some love. Anyways, let’s hope for Mac Update and feel free to use the workaround. PS: no offense will be taken for locking this thread also I like my razer products a lot and not having them working is a pain My answer from Apple forums: Mac OS Big Sur and Razer Synapse 2.0 v1.88.20. After 4 hrs I've got it working. After update to Big Sur Synapse was loading for me but was not detecting devices. manually running sudo kextload /Library/Extensions/RazerHid.kext will error suggesting to Approve extension via System Preferences. 3rd Party extension popup and Allow never showed up in a pane. After digging around and looking up Razer TEAMID R2H967U7J8 I was able to manually adjust security settings: Boot into Recovery Mode Click the Utilities menu and select Terminal. Execute the following command: /usr/sbin/spctl kext-consent add R2H967U7J8 Verify that team got added /usr/sbin/spctl kext-consent list Should output something like: Allowed Team Identifiers: R2H967U7J8 Close the Terminal app and restart After this I was able to execute sudo kextload /Library/Extensions/RazerHid.kext Got popup and Allow button in System Preferences. Allowed extension and restarted. Got my Naga Epic Chroma back in Synapse after reconnecting it.