First I bought the Spark I loved but didn't like the small phone I had so soon bought an ipad mini 4 to fly it.. Now only 3mos later I added a new Mavic Air but the first videos were stop and start jerking around and found out my 2011 imac I've liked all these yrs won't play the 4K videos and had to switch it down to 1080..I've spent over 2g on this in 3.5mos, Any ideas please on my best options other than dumping more money into this and buying a new or used imac 4K retina? thanks for looking