After the update Catalina 10.15.7 have problems with the Internet connection

This makes me wonder if Apple has a WiFi driver problem.

👍 Always!

You'll have to follow their instructions for uninstalling.

But be prepared for eventually having to do a clean install.

It is not just that cmm modifies system behavior while it's installed, it often corrupts files, so uninstalling is not guaranteed to revert your mac to good health.

Found the solution....!!!!!!!!!!!!!!!!!!!

1. First point if you're using any third party cleaning software like cleanMyMac x then just remove it from your machine. Then follow the below tutorial.

If anyone is still facing an issue in latest update of catalina then i would suggest just go through this video tutorial before reseting your mac.

https://www.youtube.com/watch?v=42oGuoGI9U4

I had tried many ways to fix the issue, even i had ordered the custom connector which is having ethernet cable but found this solution which perfectly worked fine for my laptop(Macbook pro 13'' 2020).

This issue has been plaguing me too. Just randomly browsing the internet stops, through safari and chrome. Everything else continues to work, like sending emails, Skype messages etc

Unfortunately turning the WIFI on and off doesn't work, and I've even deleted it and re-added it in the advanced options. It's a full reboot for it to work again

Now for the apple purists. Yes I have AVG anti virus, F5 VPN and AVG VPN and the reason is that I need an antivirus client to get on to the company network. The deal here is that I had no problems with this setup in 10.15.6

I have a Mac book pro early 2015 so any advice would be welcomed

Hey there! This may not be the cause for you, but I have seen Tunnelblick cause similar troubles after updating. It maybe worth uninstalling it, (Which usually removes the files from the locations in the report but may not), and if there, removing it from your Network Interfaces (System Preferences > Network (Left column)), and I’d remove all those login items as well from System Preferences > Users and Groups > Login Items, restart and test. I posted some other steps earlier, but this issue doesn’t seem like an all in one fix, but takes some isolation.

TL;DR: See if you have WPA3 enabled on your router (access point) and try disabling it there. No changes were needed on macOS devices after my long search for a solution.

So I had the same problem for 2 weeks now and have a unique situation to get to the bottom of this: I have 2 MacBooks from 2 work projects and my wife has a private MacBook + we have a lot of other devices in our home network. At the beginning of last week we updated all MacBooks, but also my router had a firmware update available which I installed the same day. Since then there were those network disconnection problems.

At first my wife was away from home for the week, so her MacBook wasn't affected and I only worked on one of my MacBooks, so the problem seemed to be only with this one. I tried finding a solution, but found none, so on the weekend I did a clean install, but it didn't fix the problem.

Working on the other MacBook exposed the connectivity problems there, too. Moreover as my wife had no problems during the week away from home and experienced the same issues coming back to our home network, I suspected the router to be the problem and reset it, but that also didn't help.

Now I looked into the system logs of the router and found that only the MacBooks were affected and even more interestingly they always logged out at the same time and exactly every 10 minutes. That had me back to suspecting the macOS update and so I found this thread, but our devices have different anti-malware software (and after looking into CleanMyMac I uninstalled it on my machine), the anti-malware on my wife's device is still active and my other MacBook had no such software.

But I already suspected that that can't be the solution since they are disconnecting like clockwork at the same time, which had me looking into network settings and I thought about what changed apart from the router having a new firmware and I only remembered changing the security settings since the new firmware of the router started supporting "WPA2 + WPA3". After going back to "WPA2 (CCMP)" a little over an hour ago all our devices are steadily connected without any problem.

Maybe someone else can confirm that this is not only the solution for me, but also to your problems.

This is still plaguing me. I've tried updating DNS when its not working to 8.8.8.8 but still no joy. what makes me laugh is that emails still come and go, Skype messages work but when I use safari the browsing just randomly stops, the blue bar holds up after its 1/10t through. to fix it I have to do a full restart and it then all works again.

Once you have removed the CMM software via the developer's instructions you can check to see if you've removed all of the supporting files by downloading and running Find Any File to search for any files with the application's name  and the developer's name in the file name.  For XXXX software you'd do the following search(es): 

1 - Name contains cleanmymac

2 - Name contains macpaw

Any files that are found can be dragged from the search results window to the Desktop or Trash bin in the Dock for deletion.

FAF can search areas that Spotlight can't like invisible folders, system folders and packages.  

If you have problems moving the files to the Trash bin boot into Safe Mode (How to use safe mode on your Mac - Apple Support) by booting with the Shift key held down, rerun Find Any File and move the files to the Trash bin from there. Then reboot normally.

NOTE: Safe Mode boot can take up to 10 minutes as it's doing the following; 

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts 

• Deletes font caches, kernel cache, and other system cache files

Etrecheck is a diagnostic tool that was developed by one of the most respected users here in the ASC and recommended by Apple Support  to provide a snapshot of the system and help identify the more obvious culprits that can adversely affect a Mac's performance. It is totally harmless and does not publish any personal information. It even shortens disk drive names from like "Machintosh HD" to "M**********D".

Have you run any "cleaning", "optimizing", "speed-up" or anti-virus apps on your Mac? There is no reason to ever install or run any 3rd party "cleaning", "optimizing", "speed-up", anti-virus or security apps on your Mac.  This user tip describes what you need to know and do to protect your Mac: Effective defenses against malware and other threats - Apple Community   

AParyan ran it and found out what was causing the problem.

Make a New Location, Using network locations in Mac OS X ...

System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.

System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.

The interface that connects to the Internet should be dragged to the top of the list.

Sys Prefs>Network>highlight the Interface you're using>Advanced>TCP/IP>Configure IPv4: Using DHCP.

If using Wifi, instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.

System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.

Make a New Location, Using network locations in Mac OS X ...

System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.

System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.

The interface that connects to the Internet should be dragged to the top of the list.

Sys Prefs>Network>highlight the Interface you're using>Advanced>TCP/IP>Configure IPv4: Using DHCP.

If using Wifi, instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.

System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.

I'm having the same issue. I actually called the internet provider but the issue wasn't coming from them. My Macbook pro now has issue connecting to the wifi. It keep saying "Looking for network". I re-started my computer several time but no success. Anyone else having the same or similar issues? It's frustrating :(

I have this same issue. In my case there is no wifi. The button is not highlighted at all.

The etrecheck diagnosis is pasted below

EtreCheckPro version: 6.3.4 (6D021)

Report generated: 2020-11-12 10:02:18

Download EtreCheckPro from https://etrecheck.com

Runtime: 1:49

Performance: Excellent

Problem: Other problem

Description:

No Wifi

Major Issues:

    Anything that appears on this list needs immediate attention.

    Unsigned files - There are unsigned software files installed that could be adware and should be reviewed.

Minor Issues:

    These issues do not need immediate attention but they may indicate future problems or opportunities for improvement.

    Clean up - There are orphan files that could be removed.

    32-bit Apps - This computer has 32-bits apps will not work on current versions of the operating system.

    Limited drive access - More information may be available with Full Drive Access.

Hardware Information:

    MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)

    MacBook Pro Model: MacBookPro15,4

    1.7 GHz Quad-Core Intel Core i7 (i7-8557U) CPU: 4-core

    16 GB RAM - Not upgradeable

        BANK 0/ChannelA-DIMM0 - 8 GB LPDDR3 2133

        BANK 2/ChannelB-DIMM0 - 8 GB LPDDR3 2133

    Battery: Health = Normal - Cycle count = 281

Video Information:

    Intel Iris Plus Graphics 645 - VRAM: 1536 MB

        Color LCD (built-in) 2880 x 1800

Drives:

    disk0 - APPLE SSD AP2048N 2.00 TB (Solid State - TRIM: Yes)

    Internal PCI-Express 8.0 GT/s x4 NVM Express

        disk0s1 - EFI [EFI] 315 MB

        disk0s2 [APFS Container] 1.99 TB

            disk1 [APFS Virtual drive] 1.99 TB (Shared by 5 volumes)

                disk1s1 - 1******* - Data (APFS) [APFS Virtual drive] (Shared - 415.43 GB used)

                disk1s2 - Preboot (APFS) [APFS Preboot] (Shared - 81 MB used)

                disk1s3 - Recovery (APFS) [Recovery] (Shared - 529 MB used)

                disk1s4 - VM (APFS) [APFS VM] (Shared - 1.07 GB used)

                disk1s5 - Macintosh HD (APFS) (Shared - 11.01 GB used)

        disk0s3 10.87 GB

Mounted Volumes:

    disk1s1 - 1******* - Data [APFS Virtual drive]

        1.99 TB (Shared - 415.43 GB used, 1.56 TB free)

        APFS

        Mount point: /System/Volumes/Data

        Encrypted

    disk1s3 - Recovery [Recovery]

        1.99 TB (Shared - 529 MB used, 1.56 TB free)

        APFS

        Mount point: /Volumes/Recovery

    disk1s4 - VM [APFS VM]

        1.99 TB (Shared - 1.07 GB used, 1.56 TB free)

        APFS

        Mount point: /private/var/vm

        Encrypted

    disk1s5 - Macintosh HD

        1.99 TB (Shared - 11.01 GB used, 1.56 TB free)

        APFS

        Mount point: /

        Encrypted

        Read-only: Yes

Network:

    Interface en2: Bluetooth PAN

    Interface bridge0: Thunderbolt Bridge

System Software:

    macOS Catalina 10.15.5 (19F96)

    Time since boot: Less than an hour

Security:

    Gatekeeper: App Store and identified developers

    System Integrity Protection: Enabled

    Antivirus software: Apple

Unsigned Files:

    Launchd: /Library/LaunchDaemons/com.microsoft.teams.TeamsUpdaterDaemon.plist

        Executable: /Applications/Microsoft Teams.app/Contents/TeamsUpdaterDaemon.xpc/Contents/MacOS/TeamsUpdaterDaemon

        Details: Restrictive config permissions - possibly adware

32-bit Applications:

    2 32-bit apps

System Launch Agents:

    [Not Loaded] 16 Apple tasks

    [Loaded] 187 Apple tasks

    [Running] 110 Apple tasks

Masta77, I don't think that your problem is the same.

You are not even running 10.15.7 - the report says 10.15.5.

You should probably start a new thread and tell us what this means: "The button is not highlighted at all". Do you mean that Wifi in System Preferences->Network does not show a green, orange or red dot? Is it even turned on?