After the update Catalina 10.15.7 have problems with the Internet connection

Hi DiZoE,

no I haven't tried to play with the system preferences. I don't want to mess up the system and it doesn't make much sense to me. One day I am on High Sierra fine then I decide to make a fresh install of Catalina fully up to date 10.15.7 and the wifi becomes weak and drops at an abnormally short distance. I haven't messed up with the system preferences.

Regarding the fact that the same problem happens in recovery mode doesn't mean much since the recovery partition (and its drivers) are made from the system that's installed, in our case Catalina. So faulty drivers would be present and used in recovery mode as well.

I have tried to run the diagnostic tool you mentioned by booting with the D key pressed or Alt-D. In my case it never led to the screen they show on Apple website. I end up with a grey Earth in the middle of the screen, and then a black screen with some weird error codes in top left hand corner.

I also find it hard to understand the concept of "an update that unveils an already existing hardware problem" on a computer that did not have any wifi problem. My Wifi of my Macbook Pro Santa Rosa which is 13 years old also runs fine.

Again: the wifi hardware is detected as fine in the syst report and the wifi signal works fine...only if I sit next to the router...which wasn't the case before I made a fresh installation of Catalina.

I can't test putting High Sierra back at the moment, but when I can I will try.

Here's my report. I have the same problem. I updated the user's mac and now the network connection cuts out. I can be on wireless and be fine for a while and then wireless stops and nothing will get it to reconnect so I connect to wired network. Then that works for a while so I try wireless and now that is working. I'm so lost on a MAC. :(

Interestingly, some people who say they didn't have any wifi problems under Catalina seem to have very similar problems to ours in BigSur after upgrading from Catalina...

https://discussions.apple.com/thread/252217838?answerId=254476202022

For those wondering, the macos security update released yesterday for Catalina and Big Sur doesn't fix the problem... ^_^'

But when you look at what has been patched, I would strongly recommend applying the update...

I have the same problem and on three different macs, two macbook pros (2020) and one imac (2015). While the network interface states that it has an internet connection, there is no response from the router when prompted in the command line.

I did the software update this afternoon. Since then WiFi signal is fine, but internet keeps saying I am not connected. I do not have Norton or other antivirus software. Already had one useless call with Apple Support. Waiting on next level call back.

same problem after upgrade to 10.15.7!!!

I am facing same problem

Here is my report.

Ok, thank you so much for the advice. Is there any particular way that I should uninstall cleanmymac?

These "security" programs are the problem, not the solution.

Whoever "requires" them is doing their users a great disservice.

BoGet777 wrote:

Don't talk nonsense.

Ok, whatever. You come here for assistance, and then refuse those who try to help.

Since you know better, I'm out.

I have the same problem.

But I haven't got installed any antivirus or so. It is so difficult to work as you said.

Is there any workaround there?

Thanks!