OK so I have an imac from 2007. Only has 3 usb ports. 1 for keyboard which in turn has mouse plugged in. I prefer wired KB and mouse. I tried a usb hub (powered) but when plug in my iphone itunes tells me to plug into the imac direct. Tried another usb hub today, well it just made a fizz sound and lots of smoke. took 10 mins to get the imac going again. What hubs to you guys use and will my iphone 6s plus work in it. my desk in corner so rear not as easy to get to. That's why I want a hub.