When you live life in the fast lane like I do, every hour of your day booked with high-powered business meetings, lunches with the Russians, and cocktails with the Italian swimsuit models, you tend to forget things. The administrative tasks of life, such as remembering to lock up the secrets to eternal youth and the GPS coordinates of the last remaining unicorn colony on your laptop, often slip through your fingers. That's why handy little fobs like the Sesame 2 make for a worthy addition to your keychain, or the fifth pocket in your designer jeans. Keep the Sesame on you and it will auto-lock your Mac every time you walk away, and then auto-unlock it when you return.
You can customize Sesame 2's lock/unlock parameters with "Near" or "Far" designations. The former will activate the fob when you are 6 to 8 meters away from your Mac, and the latter at 8 to 15 meters. It functions with Low Energy Bluetooth for minimal power consumption, and hopefully fewer gene mutating properties. Compatibility is as follows: iMac late 2012 and newer; MacBook Air mid-2011+; MacBook Pro mid 2012+; Mac Mini mid 2011+; Mac Pro late 2013+; and OS X 10.9 and 10.10.x.