I read on their site that profiles aren't cross compatible between the Windows and Mac platforms. I've recently been playing with my iMac and printing using the Windows profile and results seem to be excellent.
I still find the Mac very challenging for printing (and pretty much everything else tbh!) being a PC man through and through
but these most result results encourage me a little more.I'll maybe get a Mac profile from Ink Experts if they do one for my 1500's and se how it compares.