Android/Mac: If you want to take screencasts or screenshots of your Android phone and instantly have them saved to your computer, AndroidTool makes the process as simple as a single click for Mac users.
AndroidTool is a simple open-source utility that connects to your Android phone via ADB, so you'll need to have Developer Options enabled on your device before you can use it. (Go to Settings > Developer, enable developer options, then enable USB debugging.) From there, just plug in your device to your Mac via USB and launch the AndroidTool utility on your Mac.
If everything's connected properly, the tool will show your Android phone's model number, acknowledge that it's connected, and give you two large buttons to either take a screenshot or start recording your screen. Everything you capture or record is saved in an "AndroidTool" folder on your desktop, so you don't have to go hunting around for it.
That's all there is to it. The app is simple, lightweight, and gets the job done. It doesn't have the bells and whistles of a heavier tool like AirDroid, but if you want something simpler that can support multiple phones or Android devices connected to the same Mac at the same time, this is a good option. Hit the link below to give it a try.