Already have Michelle, they arent interested, I first raised this issue a year or so ago. Hopeless. The only way it works is i have to email the photos to myself, choose the smallest file size possible, save them from an email onto my computer, and then upload them that way. the files end up being about 600 x 600 pixels, so the quality is pathetic. 

Ive been having the problem for a year. went through the user support, and they were never able to solve the problem. Half of my listings have no photos now, which means they dont get sold and trademe miss out. all files well under the 5mb, cant upload from macbook or iphone. they upload to other platforms such as facebook or my ecommerce site just fine. there are dozens of threads on the same issue, trademe just wasting thier time on this new look development instead of getting the basics right.