I bought Poser Pro 4 and have upgraded every time ever since.  Always through digital river or the manufacturer.  Currenly its SM as we all know.  I think I did the digital download for 2012 and the options at the download page after I paid SM included Mac and windoze and linux.  For 2014, I paid for the box version.  All I got were two dvd's.  No manual ( was pdf).  Two disks.  One was Win, one is Mac/Universal.  I think the Universal is Linux.