FYI: This is my first time posting on MacRumours I decided to do a clean install of Mavericks on my 2010 iMac 21.5" since it was getting a tad slow. I took the appropriate steps to back up all my files and applications, so I was confident and went ahead with the wipe. Now that I'm in the process of installing everything again, I've encountered a lovely surprise. I forgot to back up my Photostream photos (which are all the photos I've taken with my iPhone over the past 6 years). Now I know the following: - Photostream keeps photos synced across your iDevices, and stores up to 1000 on your iOS devices but is able to store ALL of them on your Mac (iPhoto under Shared > iCloud) - There is an option in iPhoto preferences called 'Automatic Import' which imports your Photostream Photos into your iPhoto library. I wanted to keep family/event photos (i.e. Summer Holiday taken with a digital camera) separate from the photos I took from my iPhone. I left this unchecked so my iPhone photos would NOT appear in iPhoto Events. I realise this was stupid, because had I done this I wouldn't have this problem -_- - The latest of the Photostream photos that are still on my iPhone I have been able to recover, but I know that not all my Photostream photos (>1000) are on my iPhone. So the real question is: Where are ALL the Photostream photos stored on a Mac? I backed up my iPhoto Library (~30GB) - could they still be in here somewhere? Or were they stored somewhere else on my iMac (before the wipe) and now they're gone forever? In a nutshell: The photos viewable in (Shared > iCloud) in iPhoto: What is the location of the folder(s) on a Mac that actually stores these photos? I'm sorry if I haven't explained this properly!