MG, have you;
Right clicked on 'Click for download from google drive'
Selected - 'Download linked file'
Gone to 'downloads' file on you Mac
Double clicked on edit.html file
if asked - Opened file (file opens at 100%)
Right clicked and selected - 'Use image as desktop picture?
Checked on both an iMac and MacBook
Failing that, pm me and I'll mail it to you
