A sidebar is a useful feature present throughout the Mac OS X to quickly navigate to directory pictures, documents, the desktop, Macintosh HD, and tags. There are some users that seem to be missing sidebar in the open and save dialog windows of Mac OS X. If you are one of those, then you have landed on the right page.
The issue is minor and hardly takes a couple of minutes to resolve. We have mentioned below the process, which when followed, will bring back the sidebar on your Mac OS X. So, all you will need to do is to head south and read the details to resolve missing sidebar issue.
How to Fix Missing Sidebar in Open and Save dialog window in Mac OS X
#1. Disabled sidebar accidentally
This is one of the most common reasons of a missing Sidebar on Mac OS X. A user might have accidentally disabled the sidebar. To get it back, you will just need to click on the Sidebar button located at the top-left corner of Open and Save dialog windows of Mac OS X.
Now, if that did not help you, then we will need to go a little deep into the matter to resolve it.
#2. Deleting Sidebar Plist file
There are chances that the Sidebar Plist file is corrupted. It's not possible to repair it and thus, the only solution is to delete it. Don't worry; your Mac will automatically create a fresh new Sidebar Plist file after a restart. Just check how to locate and delete sidebar Plist file.
Step #1. Launch the OS X Finder and press Command+Shift+G on your Mac keyboard. This will bring up Go To Folder.
Step #2. You will need to go to the following path to get the sidebar Plist file.
Step #3. Under that, locate “com.apple.finder.plist” file and move it to trash.
Step #4. Close everything and restart your Mac.
This process will force Mac to make a fresh new plist file for the sidebar, which won't be corrupted and you will get your sidebar back.