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<font face="Tahoma">Ah yes, an example of what I am seeing:<br>
<br>
</font><br>
<font face="Tahoma">Marks-MacBook-Pro.local
(172.16.0.239)
2020-10-29T14:28:27+0200<br>
Keys: Help Display mode Restart statistics Order of
fields quit<br>
Packets Pings<br>
Host
Loss% Snt Last Avg Best Wrst StDev<br>
1.
172.16.0.254
0.8% 126 3.9 34.7 2.5 232.1 54.9<br>
<br>
Mark.<br>
<br>
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<div class="moz-cite-prefix">On 10/29/20 14:07, Mark Tinka wrote:<br>
</div>
<blockquote type="cite"
cite="mid:c7b7ef7e-35cc-ae53-4002-baee738e08ff@seacom.com">
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<font face="Tahoma">Hi all.<br>
<br>
I've been on High Sierra for several years now due to a
limitation with an app that couldn't deal with Apple's latest
rounds of system permissions since Mojave. Eventually, I gave up
on waiting for them to fix it and upgraded my older Butterfly
keyboard laptop to Catalina 4 weeks ago.<br>
<br>
At the same time, I picked up the new Magic keyboard laptop 2
weeks ago which came with Catalina.<br>
<br>
Over the past week, I've been troubleshooting a massive jitter
issue on Catalina, just between itself and my home router. For
control, I have a Windows PC (tower-top) using a wireless
adapter to connect to my home network. That has no jitter at
all.<br>
<br>
I have noticed as much as 300ms+ jitter on Catalina.<br>
<br>
I then asked a few friends around the world to run tests for me
on their own Catalina installations to their local router over
wi-fi, and the results are the same. Jitter so high that what
should be a 1ms - 5ms latency can (for a short period) jump to
200ms+, 300ms+, 400ms+.<br>
<br>
On the off-chance that it is an issue with the new wireless
chips on the later MacBook models, one of my friends tested the
same on a 2013 MacBook Pro running a beta version of Big Sur.
Same story!<br>
<br>
Another friend in South East Asia, testing on a 2018 13-inch
MacBook Pro running Catalina, also had the same issue.<br>
<br>
A Google search suggests that this is some known issue since
Mojave, to do with Location Services, and some other apps, in a
non-deterministic way:<br>
<br>
<a class="moz-txt-link-freetext"
href="https://apple.stackexchange.com/questions/263638/macbook-pro-experiencing-ping-spikes-to-local-router"
moz-do-not-send="true">https://apple.stackexchange.com/questions/263638/macbook-pro-experiencing-ping-spikes-to-local-router</a><br>
<br>
For me, even after disabling all or some Location Services
features, the problem remains.<br>
<br>
Is anyone else seeing this on their Catalina Mac's while on
wi-fi? If so, does anyone know what's going on here?<br>
<br>
Ideally, this wouldn't matter if it was just a cosmetic issue -
but I do actually see physical impact to performance of network
access to/from the laptop, which has all the hallmarks of high
jitter and/or packet loss. <br>
<br>
An app like Zoom, which can display network performance data for
a session in real-time, does indicate nominal packet loss for
audio and video on this device, while other devices on the same
WLAN are happy.<br>
<br>
Thoughts?<br>
<br>
Mark.<br>
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