Finder sidebar duplicating entries I'm trying to figure out why one of my drives is appearing multiple times in the Finder sidebar.
If I drag the list order a new one is generated. Dragging out to the desktop, the normal way of deleting them, fails; it simply reappears immediately in the sidebar.

From georgegarside blog - Mac Finder Sidebar Favourites Location I discovered the names &amp; locations of the two files possibly responsible.
~/Library/Preferences/com.apple.finder.plist
~/Library/Preferences/com.apple.sidebarlists.plist
I tried throwing them away, but that was considerably more trouble than it was worth, as defaulting the Finder views entirely is just too much work to put back how I like it.
The .plist files themselves look pretty complex, so I'm trying to figure out what I can safely delete to see if will restore normailty.
As I had backups of everything I decided to play fast &amp; loose with copies of the two .plist files.
I dropped both files into BBEdit &amp; tried to make sense of the reams of data.
The sidebar file looked at a glance more promising so I started with that.
I realised it had several thousand aliases to disk drives, SD Cards, CDs, RAMDisks &amp; disk images permanent &amp; temporary, dating back over perhaps a decade.

Carefully selecting sections from &lt;dict&gt; to &lt;/dict&gt; in each case, I deleted all aliases except the one that contained SeenAsBootVolume. Saved &amp; relogged.
Success. The current list rebuilt itself, the myriad 'spares' were gone &amp; the drive no longer duplicates if I move/drag items in the list.
As a hint as to just how many old drive aliases I did actually delete -  the file was 82MB… it is now 9KB.

 …and, no, the date modified on the older one doesn't make any sense to me either;)