Hi, I followed everything in the instruction of @Avaddon. After correctly allowing Team Identifiers via Recovery Mode: R2H967U7J8 And entering the command sudo kextload /Library/Extensions/RazerHid.kext in Terminal after a restart, I get the following message: Extension with identifiers com.razer.common.razerhid not approved to load. Please approve using System Preferences. When I go into System Preferences there is no "allow" button. When opening Razer Synapse I still get the message: Please Connect a Razer Synapse Enabled Device. I tried to restart my computer, unplug the mouse and re-install Razer Synapse, but I am always stuck at the final part. Do you know a fix?