Razer mouse not detected since update
Per instructions found on this site:
Boot into recovery mode (Restart your mac and hold ⌘+ R during startup. (Command + R)
Go to Utility → Terminal
Type
/usr/sbin/spctl kext-consent add R2H967U8J8
and press EnterType
/usr/sbin/spctl kext-consent list
and press Enter
Recommend to visit the site listed above to see full details about what is being done here.