Throught out our history knowledge and information has been passed from one generation to another using some form of written inscriptions. Some kind of paper and some pencil or pen used to inscribe that information on the medium.
Image Courtesy of desktopnexus
Today we live in the digital age and pen and paper even if it seems dear has alternatives in the form of keyboard and touch screens as inputs and our displays as the moder day papers.
These are the list of few apps that will help you take notes on your mac and i have found them very useful , hope it helps you as well.
Note Taking Apps 2016 for the MAC
Tested On OSX : Yosemite 10.10.3