Hi, I'm sorry, I searched around on this but don't see something quite the same as what I'm experiencing. iCloud folders (only iCloud) that are pinned to the sidebar in Finder sometimes show up and sometimes are missing. Going to iCloud Drive sometimes only shows a couple of folders, with most of them missing (e.g., right now, if I click on iCloud Drive, I just see two folders I put there, but none of the app folders - like my Pages, Preview, Keynote, Numbers, Pixelmator, etc folders are all missing). HOWEVER, all of these files are still accessible (and new files save and sync to the cloud correctly) - in Preview's open dialogue, the Preview folder is pinned on the left, and all the files are there. But not in a Finder window. And the same for all the other apps (these files also show up in "All My Files", but right click -> show in enclosing folder is inconsistent in its behavior). Also when these folders do show up, rather than showing up with Numbers and the icon in the Finder window title bar, it shows up as "com~apple~Numbers". What's going on? EDIT: Sorry, 10.11.5, don't think I saw this before this El Capitan version. EDIT: Also other important detail, it seems to work correctly on reboot and then comes back again later.