I have built a arducopter a few years ago end 2012, but I encountered some problems and left it there (and also for other personal reasons) till now.
It was with the APM 2.0 board. Now I'm trying to catch up and I've seen that, apart from APM 2.5 e 2.6, there are also other boards around, like Pixhawk and PX4.
So, first question was: can I still run arducopter 3.1 (and 3.2 when it will be available) on my APM board 2.0?
Second question is: how are the 3 boards different (in term of functionalities)?
Actually one bonus question: is the APM Planner that runs on Mac usable as only planner, or would I still need a Win box (or VM in Mac) to run the normal mission planner?