@zhulien,

Set up a shared partition that both MacOSX and MorphOS can read and write to and then download any large files you need using Firefox, or TenFourFox on MacOSX and place the files in that partition, so you can access them from MorphOS2.7 and get a better experience checking out MorphOS2.7 before you decide to register and buy a keyfile.

Not sure why you can't download what you need during the 30 minutes the demo version runs before slowing down, but maybe you have a slow connection, or the site hosting what ever file you are after has some kind of bottleneck, or speed limitations that is preventing you from being able to download the file in less than 30 minutes.