Like many other people, ever since I "upgraded" to Catalina 24 hours ago, NSurlsessiond is using up an enormous amount of CPU power and is burning through my battery. A quick web search indicates this is a very common problem. Why is Apple not responding? What can people do to fix this? (Early 2015 13 inch Retina Macbook Pro, 3.1 GHz; 16 GB 1867 MHz.)
MacBook
tsippi wrote:
Like many other people, ever since I "upgraded" to Catalina 24 hours ago, NSurlsessiond is using up an enormous amount of CPU power and is burning through my battery. A quick web search indicates this is a very common problem. Why is Apple not responding? What can people do to fix this? (Early 2015 13 inch Retina Macbook Pro, 3.1 GHz; 16 GB 1867 MHz.)
https://discussions.apple.com/thread/7525492
To trouble shoot further you can:
—Try a SafeBoot https://support.apple.com/en-us/HT201262
Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc. Login and test. Reboot and test as caches get rebuilt.
In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a reboot will put it back to normal mode.
This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.
—Test issue in another user (or guest user) account https://support.apple.com/en-us/HT204443
This will tell you if it a universal issue or isolated to your user/admin account.
tsippi wrote:
Like many other people, ever since I "upgraded" to Catalina 24 hours ago, NSurlsessiond is using up an enormous amount of CPU power and is burning through my battery. A quick web search indicates this is a very common problem. Why is Apple not responding? What can people do to fix this? (Early 2015 13 inch Retina Macbook Pro, 3.1 GHz; 16 GB 1867 MHz.)
https://discussions.apple.com/thread/7525492
To trouble shoot further you can:
—Try a SafeBoot https://support.apple.com/en-us/HT201262
Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc. Login and test. Reboot and test as caches get rebuilt.
In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a reboot will put it back to normal mode.
This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.
—Test issue in another user (or guest user) account https://support.apple.com/en-us/HT204443
This will tell you if it a universal issue or isolated to your user/admin account.
I lucked out on my second call to Apple support and got a super knowledgable person who normally is an in-store genius. After checking a few things, he had me wipe my entire disk and reload the operating system, which solved the CPU use problem. Fortunately most of my files were stored in multiple clouds. I am slowly going through my backup disk item by item and downloading items I need that were not in any clouds. (Most of these things were on my desktop, so they are easy to find.) I don't want to download the entire backup disk, as whatever was corrupting the program is still there. BTW, I suspect the problem was somewhere in keychain, possibly involving old DoD security certificates that I was unable to delete, despite several hours of trying to do so.
Mac Mini 2014 Catalina 10.15.5 ... new issue with NSURLSESSIOND ... related to Apple Mail. Isolated to Apple Mail. Using 64% and more of CPU. This Mini has 16 GB w/SSD.
Now I shut down when I quit Mail, and restart before using any other application.
With several other Apple Mail issues being reported (like column width control), this needs to be fix soonest.
Continuing aggravation with nsurlsessiond. This is Activity log several minutes after disconnecting from internet ... NSURLSESSIOND continues to run. What IS IT DOING?????
nsurlsessiond 47.0 52:11.30 4 13 0.0 0.00 25
trustd 35.3 37:34.95 3 15 0.0 0.00 185
syslogd 30.3 32:37.81 7 6 0.0 0.00 10
I found it in Users/me/Library/Caches/com.apple.nsurlsessiond ... and deleted that folder ... OK for a while, but it came back.
My opinion: it (nsurlsessiond) is a useless daemon taking 60% of my CPU workload, and making my Mini run HOT!!!
It is NOT uploading/downloading ANYTHING. It runs just the same when my computer is off-line: unplugged and wifi off.
All this time, and more aggravation with NSURLSESSIOND. Makes my Mac Mini run hot!! uses ~60% CPU. I even deleted it from the Library .... comes back. It's like the plague. Someone please find a solution to get rid of it.
nsurlsessiond burning through battery since Catalina "upgrade"
