Imac 5k Extremely slow and beach balling after 10.15.7 (19H15) supplemental update.

[wlossw]

So I installed 10.15.7 (19H15) Supplemental update 2 days ago and my iMac has become borderline unusable, beach balling like crazy.

I attached the CPU usage graphs for the last 7 and 30 days, and as you can see CPU is through the roof compared to my baseline.

Apps are taking way longer to launch (like spinning disk slow)

Anyone have any insight? Has anyone experienced anything similar? I know that the OS can get a little testy as it has maintenance to run after update...

I would appreciate any insight other than advice to upgrade to Big Sur!

*It seems like non app-store apps seem to be hit harder in terms of performance. I really hope this isn't the so called security fix's fault...

 

[saudor]

my mojave install has gotten super slow and freezing up like crazy just now. Apps keep bouncing and don't open. If i turn off wifi, everything is super fast and all apps open immediately.

I guess tim crook will send a popup soon: "Mac running slow? Buy a apple silicon mac today!!"

 

[thatsfinebut]

I am getting this too on two different computers, both running the latest 10.15.7 supplemental update. I think I ran that update on my 16" rMBP a couple days ago, and things were fine afterward.

Part of me thinks this has something to do with either:

1. The release of Big Sur.
2. The release of the Apple Silicon chips.
3. Some popular third-party app that recently updated itself in preparation for #1 or #2 above, and it is seriously crippling our computers.

 

[wlossw]

my mojave install has gotten super slow and freezing up like crazy just now. Apps keep bouncing and don't open. If i turn off wifi, everything is super fast and all apps open immediately.

I guess tim crook will send a popup soon: "Mac running slow? Buy a apple silicon mac today!!"

You're not going to believe this, but disabling my network connection also seems to get rid of my lag. Of course I had to reconnect to reply to your post, and wham. it's back!

This is super weird.

 

[neuralengine]

This has just started happening to me too, completely out of nowhere. 2020 iMac i7 / 5500 XT. I installed the update a while ago but this just started happening today. I don’t have anything abnormal in Activity Monitor. CPU, RAM and GPU loads are negligible in iStat Menus.

 

[wlossw]

This has just started happening to me too, completely out of nowhere. 2020 iMac i7 / 5500 XT. I installed the update a while ago but this just started happening today. I don’t have anything abnormal in Activity Monitor. CPU, RAM and GPU loads are negligible in iStat Menus.

Little snitch isn't showing anything interesting during a lag session...

 

[Insleep]

This is happening to me as well on all of my Macs. When I turn off Wi-Fi, everything opens as normal. Must be an issue with Apple servers right now (because every time you open a third-party app, macOS phones home to make sure it isn't malware).

 

[neuralengine]

Can confirm that disconnecting from the network (unplugging ethernet and turning off wi-fi) seems to fix it completely.

What the actual.

 

[wlossw]

on the plus side, now we know it will get fixed.

 

[Dr. McKay]

Same here, 2017 27 inch iMac Retina, 32Gb of RAM, Radeon Pro 570 4Gb, Catalina with latest update.
Every app I want to launch : mac freezes for about a second, then two seconds of spinning beach ball, also happens with Apple's own apps...
Also takes a while to finish the bootup process.

 

[neuralengine]

on the plus side, now we know it will get fixed.

… let’s hope! Mine just took 3 minutes launching VS Code.

 

[neuralengine]

There’s another thread here, it’s not just us:

Having wifi enabled slows my mac down to a crawl

This is the most bizzare problem. My Macbook slows to a crawl when WiFi is enabled. I'm not talking about internet speed, that is fine. But simply launching or using apps becomes extremely slow. Apps will bounce on the dock for 10 minutes before they load. As soon as I turn off Wifi...

forums.macrumors.com

 

[anthonyjr]

Literally came here to see if my random slowdown was happening to more people, since I always keep a system in perfect shape... I literally just assumed it was a Big Sur launch issue with Apple talking to my Mac.

Good to see it’s not just me. (Well, maybe not that good.)

 

[Benlehot]

Hackintosh and MacBook Pro 16 just got the slowdown while I was working. What the **** is going on. Computer are unusable.

 

[Insleep]

Just added ocsp.apple.com to /etc/hosts (redirecting to 127.0.0.1) and that solved the issue. Figure I'll remove it once this all settles down, until then I'm back up and running.

 

[thatsfinebut]

Hackintosh and MacBook Pro 16 just got the slowdown while I was working. What the **** is going on. Computer are unusable.

I thought I was being hit by some kind of ransomware because both of my computers were barely functioning (at least as far as almost every app failing to open) even after multiple restarts.

Even once some apps are open, I seem to encounter slowness.

I would think some employees at Apple aren't running Big Sur on day one and would be running into this issue as well.

 

[stockseer]

This is happening to me as well on all of my Macs. When I turn off Wi-Fi, everything opens as normal. Must be an issue with Apple servers right now (because every time you open a third-party app, macOS phones home to make sure it isn't malware).

This useful: happened to me using SnagIt, which told me to reboot computer. I do voice-over charts stock market comments; and this was the first time I could not record; otherwise the computer works, though was slow opening my browser-based (Java) quote software.

I too am on a 5K iMac and encountered this; while my (recent I-7) MacBook Pro breaks-off downloading Big Sur concurrently. WiFi is 600 mbps on that one; and over 900 mbps on iMac.

 

[Benlehot]

I thought I was being hit by some kind of ransomware because both of my computers were barely functioning (at least as far as almost every app failing to open) even after multiple restarts.

Even once some apps are open, I seem to encounter slowness.

I would think some employees at Apple aren't running Big Sur on day one and would be running into this issue as well.

Same man, I was sure it was something bad in my network haha

Just added ocsp.apple.com to /etc/hosts (redirecting to 127.0.0.1) and that solved the issue. Figure I'll remove it once this all settles down, until then I'm back up and running.

Thank you, it worked!

 

[I Need a Drink]

Absolutely nuts. I thought I got whacked with a virus or something as this happened to my 2013 iMac just as I was trying to buy a PS5 from Walmart around 3:00. Suddenly my computer slowed to a crawl. Apps wouldn't open and I just rebooted a couple of minutes ago and I still don't have all of my apps showing loaded in the Menu Bar. I'm on 10.15.7 and it was running smooth until about 3:00.

I have also run First Aid in Recovery Mode, which found nothing, Malwarebytes, again nothing, and I even downloaded and ran a report from EtreCheckPro and it found nothing as well.

 

[Ukk1]

Hello everyone,

Also noticed this problem. I found solution by disabling Ethernet, Bluetooth PAN and Thunderbolt-bridge from network settings.

EDIT: This helps if you're using Wi-fi..
EDIT: Deleting Ethernet, Bluetooth PAN and Thundebolt-bridge and then manually adding them back solves this too, without making changes or/and you need Ethernet, for example

 

[stockseer]

This has been the MOST helpful thread ever for me, on this site. You guys saved me a call to Apple (do I assume one of you has indeed advised them of the issue?) ... and I sent an email to my clients (stock market) advising them about a technical issue hampering my usual reports. At least I won't spend hours tearing my hair out; and will go to the gym and hope this is resolved by my return In a sense thank you everyone!

 

[timothevs]

WTF this is freaky! I am in the exact same boat with my iMac 2020 - Core i7, 64GB RAM. I had a meeting about to start and suddenly nothing would open. I had to join in on my iPad.

I tried everything from PRAM reset to creating a new profile. I thought I was going mad. Thank you OP for creating this topic. I wonder what the heck happened here.

I too am on 10.15.7 Supplemental Update.

I have been running Etrecheck and all the other utilities to try and figure out what is going on. THANK GOD I am not the only person.

 

[stockseer]

Likewise me (thanked just above) and I omitted noting 10.15.7 supplemental, as well.

 

[I Need a Drink]

Honestly, this is unacceptable. I have been waiting over 3 minutes for Word to open and it still isn't ready. A server slowdown/crash should not bring every Mac in the world down. I get the reason that this is happening, but they need to find a new solution for app security.

 

[SpecMode]

Something (or several somethings) is broken on Apple's backend, including the server used to verify app certificates at runtime (the macOS process involved is called trustd, which you will see generating loads of connection errors in console.app if you're connected to the Internet). The connection timeouts are what is causing the beachballing; disconnecting from the Internet or blocking connections to ocsp.apple.com "fixes" the issue, as outright connection failures (rather than timeouts) do not prevent apps from launching, for some reason.