Curious about when someone uses your Mac when you aren’t around? The Blink app will alert you when your Mac wakes up and sleeps. It’s a simple app that’s easy to set up. You just need to pair your iPhone with your Mac via Bluetooth. After the initial pairing though, you don’t need to keep your Bluetooth on or have it within range to work. Every time your Mac wakes up or goes to sleep, you’ll receive a notification on your phone. You must know though that Blink only supports newer Macs that have Bluetooth Low Energy.
Source: Lifehacker | Download: iTunes App Store ($1.39) + Mac App Store (Free)