Hi can anyone help, when I connect the drone it says it needs to update but every time I try it gets so far through then fails, I have tried doing it through the controller and also connecting it directly to the computer with dji assistant but both ways fail, it downloads gets up to about 60% installing and then fails saying about incompatability issues

Try to read some replies here : http://forum.dji.com/thread-94938-1-1.html
I had fw upgrading issues, like many other Mavic users, and finally DJI Natalia and team DJI have solved this issue for most of us.