Some stuff about Bonjour, LOTS of, and some pretty normal-looking DNS query logging.
I opened up Console, entered mdnsresponder in the search field, and watched the messages flow by for a minute or two. I also tried sending a HUP signal to mDNSResponder as follows: sudo killall -HUP mDNSResponder This made both processes go away as I intended, but still didn't fix the problem. mDNSResponderHelper did not stop, so I tried again, inserting sudo killall mDNSResponderHelper as an intermediate step. I watched the process disappear, so I know the command worked, but it immediately returned to 100% CPU usage when I started it back up. Sudo launchctl load -w /System/Library/LaunchDaemons/ I tried rebooting mDNSResponder using these commands: sudo launchctl unload -w /System/Library/LaunchDaemons/ I have a search applied in my Activity Monitor screenshot, and there's lots of other stuff going on - Slack is open, Chrome with eleventybillion tabs, IntelliJ IDEA is probably indexing something, and so on.
Bonjour browser scans forever full#
Note: In the aggregate, the bar graphs show more than one full core being utilized. The laptop has six cores (12 logical), so having one core fully occupied does not make a noticeable difference in performance (unless I start measuring how long things take - but that's noticing that the numbers are different - not that the performance is different!). I'm not sure how it's managing to do that and still sit at or just under 100% most of the time, but that's what it's doing. The Threads column in Activity Monitor indicates 3-4 threads most of the time the 100% is spread across all of those, and they're not all on the same core. When I finished and quit FCP, the fans didn't spin down, so I checked Activity Monitor and discovered that mDNSResponder is taking 90-100% CPU continuously. My laptop's cooling fans ran full-speed the entire time, but there was always background rendering going on, so I figured that was normal.
Bonjour browser scans forever upgrade#
One of the first things I did after the upgrade was edit a video using the new free trial of Final Cut Pro X.
I just upgraded my 2018 15" MacBook Pro from Mojave to Catalina (10.15.4).
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