Unlocking a Mac using an iPhone is nothing new. We have already seen a bunch of apps that make that easy. MacID for iOS happens to be a neat app that lets you unlock your Mac using Touch ID or a passcode. You can now use it to unlock your Mac using your Apple Watch. The app also lets you control the volume of your music.
MacID for iOS is secure and makes it easy to interact with your Mac from your iOS or Apple Watch device. The app sets you back under $1.