With this FOLAI lock kit, you adhere the small included part to the back of the lid, and suddenly you have a Kensington lock slot to use the included cable with.
If you’re using a Mac without a lock slot, you’re going to need an external solution. The cable thickness, cable length, lock material, luggage buckle and packing could be customized. FOLAI Laptop Combination Lock with Adhesive Security Plate.