Favorites are missing from sidebar in Save/Open dialogues (El Capitan)
The Issue
The issue is that the sidebar of all SAVE / OPEN windows is missing the favorites list. Some people also report they are missing in the sidebar of Finder itself, but in my case that was not the issue.
In some cases rebooting seems to temporarily "fix" the issue, only for it to return a little later.
Some people have suggested deleting the Finder preferences plist file ( ~/Library/Preferences/com.apple.finder.plist). But people report this does not fix it, or that it's only fixed temporarily. Deleting this file also kills all favorites from Finder, which means one has to recreate the list.
I find it hard to believe such a serious UI bug has been occurring since 10.11.0, which was released over 1 year ago.
Does anyone have a legitimate solution to this issue?
Further Background Info
This issue seems to be relatively widely reported. There are numerous instances reported here on the Apple Forums, although I have seen not meaningful discussion about the issue and permanent solutions.
It is also relatively widely reported on other websites (blogs, etc.). Various solutions are suggested, but many people report these don't fix it, or only fix it very temporarily.
As far as I can tell, this issue has been occurring for people in all versions of El Capitan, from 10.11.0 through to 10.11.6 (the most current, as of this posting).
A small sample of the instances reported here on Apple Forums:
Links in finder dialog sidebar missing
Favorite folders missing when saving as in every software program
Re: Missing Favorites or Shortcuts in Sidebar
Some references to this issue on other sites:
https://www.reddit.com/r/osx/comments/3z660v/bugmissing_favorites_in_finder_and_ applications/
http://snewsi.com/id/15422981943
http://apple.stackexchange.com/questions/208205/file-open-dialog-is-missing-side bar-items
This issue is relatively widely reported online. I've searched through the Bug Reporter and no results were returned, which seems hard to believe.
The Finder instance handles Open/Save dialogues is missing the Favorites.
Often the Sidebar is hidden. It can be restore to view, but then the Favourites are missing. People have been reporting this issue online since 10.11.0
Sometimes in Finder itself this also occurs.
Steps to Reproduce:
Use the Open/Save from within any application.
Side bar is missing all favorites. Only items seen are the DEVICES.
Expected Results:
There should be a list of FAVORITES in the sidebar of all Open/Save windows.
Actual Results:
Sidebar is missing the FAVORITES list.
Version:
10.11.6 (issue is reported to occur in all El Capitan versions)
Notes:
Report here: http://apple.stackexchange.com/questions/208205/file-open-dialog-is-missing-side bar-items
Reported here: https://www.reddit.com/r/osx/comments/3z660v/bugmissing_favorites_in_finder_and_ applications/
Reported here:
MacBook Pro, OS X El Capitan (10.11.6), 256 SSD, 1TB HDD, 8GB RAM, Matt 17"