i have a Big Sur and same problem: "Allow" button doesn't appear in System Preferences.. it is not a solution but maybe a direction for someone else (i have successfully called again once appeared modal dialog with a button to goto Preferences): reboot into Recovery Mode run terminal disable SIP (temporary) $ csrutil disable reboot in normal mode run terminal execute $ sudo sqlite3 /var/db/SystemPolicyConfiguration/KextPolicy run $ update kext_load_history_v3 set flags = 51 where team_id = 'R2H967U7J8'; push ctrl+D to exit from sqlite then, if you execute again sudo /usr/bin/kmutil load -p /Library/Extensions/RazerHid.kext you will get prompt dialog again (like first time running) now you can enable SIP ($ csrutil enable from Recovery mode) and wait until someone will find working solution :)) BTW, sqlite> UPDATE kext_policy SET allowed = 1 WHERE team_id = 'R2H967U7J8'; didn't help too (just for anybody who will find allowed flag in table kext_policy as a good assumption it can help, as i did)