Remove Duplicate Shared Computers After my upgrade to Yosemite, I am seeing a couple of extra shared computers in my finder sidebar. 

There are two additional computers that seem to be copies, based on their naming, having (#) appended to the computer name.

After checking all computers on my network, I can see that this issue is not only on one machine, they all show the same list. Additionally, I can verify the duplicates do not exist as I cannot connect to them.

I have tried the following:


Renaming my machines
Disabling / Re-enabling sharing
Restarting All Machines / Performing all necessary updates
Clearing recent servers from each computer
Restarting Airport Extreme
Relaunching Finder on each machine


Here is a screenshot displaying what I see in my Finder window:
UPDATE: Updating to 10.10.4 fixes this problem. In this point release discoveryd is replaced by the previously ousted mDNSResponder.

The originally supplied answer follows...

This is caused by an interaction with a daemon called discoveryd (that is present in Yosemite OS X 10.10.0 to 10.10.3) and the sleep proxies that are present within Apple TVs and Airports.

I outlined a workaround here; which is basically disabling "Wake for Network Access".

9to5Mac reports that discoveryd has been dropped in OS X 10.10.4 beta and replaced with the previously ousted mDNSResponder daemon. So this problem should be fixed in OS X 10.10.4.