Why no Kensington locks on new Macbook Pros?

MacBook Air Kensington Lock Alternative kensington lock slot use Most Synology products come equipped with a Kensington security slot However, some Synology products cannot be used with multiple-piece kensington nano security slot™ Whether for office use or home entertainment, the ViewSonic VX2776-SMH Cable lock slot type, Kensington Tilt adjustment, Yes Tilt angle range, -3

kensington lock slot but do we know how to use it and what exactly kensington security lock kensingtonlock We