Q: discoveryd process uses 100% CPU - Safari Can't find the server

so that lasted about 10 mins smh.... so now that im paying attention to my activity monitor in utilities kernel_task has been acting kind of shady as well smh HELPPPPPP!!!

Try to redirect the incoming port 53 to your router's IP. Once I did that run this issue went away for me.

I'm inclined to think this is bound to the discoveryd.plist mentioned before.

Fresh installs seem to help

unloading the plist seems to help

and (don't do it) deleting the .plist helps too (but you won't have internet).

hope Apple fixes this because my MBP early 2011 consumes battery power like a monster when discoveryd is burning the CPU

Don't know if this may help others.

I disabled the remote control  in the Security and  Privacy.

This so far seems to have resolved the discoveryd issue where it was showing 99% CPU usage in Activity Monitor - I also deleted out a couple of unused network services related to old mobile phones - but anyhow it all seems to be working a little bit quicker and smoother - just a RAM upgrade to do now and I hope things will be like new .......

Hello guys,

i also have problems with the discoveryd -> 100% CPU usage.

But i have no problems with safari.

For me this commands in Terminal  helps temporarily!

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist

I have the problem since 10.10.3

Its very annoying!

Hope Apple will fix it immediately....

----------------------------

Macbook Pro early 2011

15" i7

The fix that works in many (all?) cases for the 'discoveryd 100% CPU on Yosemite' issue is

Use 'Finder > Go' to go to this folder:

     /Library/Preferences/SystemConfiguration/

Delete the file 'preferences.plist' and restart your Mac. Google for the above path if you want further details.

C.

Thank you cdhw, deleting that file solved the problem... I've been struggling for weeks now and nothing fixed it.

Thanks, cdhw.  Your solution solved my problem as well!

cdhw, made my day!

thx.

In my case the issue with discoveryd chewing up my CPU was a 'messy' hosts file. I have had some entires there from way back when I was playing around with DNS and forgot all about them. Cleaned up the extra entries and left only the default loopback entry there. Flushed my DNS, rebooted the machine and voila.

Go>Go to Folder and type /private/etc/hosts

Double-click on the hosts file and see if you have any extra entries there below the IP addresses. The default file should look like this:

##

# Host Database

#

# localhost is used to configure the loopback interface

# when the system is booting.  Do not change this entry.

##

127.0.0.1                  localhost

255.255.255.255      broadcasthost

::1                             localhost

Finally... Lastest update 10.10.4 public Beta (14E17e) fixed my discoveryd issue

You ROCK!

Thank you.

Thank you cdhw!!  This was a simple fix.  Whew!

Thanks, it works