My app & controller are updated to most recent versions. App 2.8.3 RC 1.6.0 Iv'e tried 4 different SD cards in the drone. With firmaware 1.9.60 Tried about 100 different combinations. I cannot for the life of me get the drone to initiate update process. I have a mac I used disk utility to format the cards MS-DOS Fat. The app times out when I try to format card in drone. DJI technical support is useless, they tell me I have to ship drone in. Any help would be greatly appreciated. Thanks.