OS X Yosemite 10.10.5
Don't know as a programmer expert friend did it
Don't know if this computer was using icloud . Have only just bought a new iphone 6s+ this year.
I don't understand what is duplicated as have strange complement files in my ALL files folder on FINDER.
Have a Time machine and have backed up
Must advise you am of a certain age and it is now getting complicated. Spent 2 whole days trying to get photos in order on LR4 . version.3 which seemed to upgrade to LR.4 and when I ejected last night, this morning it is not loading all the work I did. Went back to my old computer and the Trash was full of photos which I tried to copy into a folder on desktop with no success as they seem all greyed out in folder. I can't understand this as was not using old Mac. A Horrendous mess.