Some time ago, I bought Logitech MX Master wireless mouse to be used with my macs. And here the story begins… Since this mouse has extra buttons I wanted to assign them my custom actions. As I read in Logitech docs I had to download driver called “Logitech Options”. So I did! Kudos section First of all I wanted to thank @Disconnect3d for helping me with reversing part. The second Kudos belongs to @Taviso who discovered similar issue on Windows simultaneously and reported it to Logitech team.