Photos app on mac says I don't have enough space???
I have my old iPhoto library that was migrated to the new Photos app. I tried to turn on "iCloud photo sharing" and it says I don't have enough room on my machine to store all the pictures... Um, the pictures are already all on my laptop. I'm not going to let iCloud download "optimized" versions of my photos to my own computer and then pray that Apple won't lose my pics on their servers. I'm trying to get them to simply upload to iCloud. Does it actually work by uploading them all iCloud, deleting them from my machine, and then re-downloading them to my machine? Even if it did, which would be silly, I'm already holding the original hi-res version of all of the pics on my computer so if they fit now why wouldn't they later?
MacBook Pro with Retina display, OS X Yosemite (10.10.3)