“ConnectionCachefld” will damage your computer.

First, start your Mac in "Safe Mode": How to use safe mode on your Mac - Apple Support. Starting in Safe Mode takes longer than usual so let it finish.

While in that mode, drag the following file to the Trash:

PT.updd.plist

Then, restart your Mac normally and confirm the alert messages cease to appear.

Note: Like all non-Apple "anti-virus" products, "Kaspersky" is worthless. You can see for yourself it did nothing to prevent the problematic "ConnectionCachefld" message. Uninstall it according to its instructions. Rule 1 of Macs is don't install junk.

vagh96, please follow the instructions below.

First, ensure you have a reliable backup of your Mac, in case something should go wrong with continued troubleshooting. To learn how to do that, please read Back up your Mac with Time Machine.

• A backup is a fundamental prerequisite regardless of whatever method you may choose uninstall adware, and would apply even if your Mac were running perfectly well. Do not overlook this fundamental requirement. It's important.

Next: This step will prevent the scam products from loading so that they can be removed while they are inactive. Restart in "Safe Mode", and log in: How to use safe mode on your Mac - Apple Support. Starting in Safe Mode takes longer than usual so let it finish. The rogue processes affecting that Mac are inoperative in "Safe Mode".

The following files and / or folders need to be deleted while using your Mac in "Safe Mode":

First screenshot:

Second screenshot:

Nothing needs to be deleted from the folder in the third screenshot.

Drag those selections of files to the Trash. You may be asked to authenticate. Confirm they are no longer present in that folder. Leave all the others alone for now.

Next: open Safari and select the Safari menu > Preferences (or Settings) > Extensions. If you see any Safari Extensions that you do not recognize or understand, simply click the Uninstall button and they will be gone. No Safari Extensions are required for normal operation. Then, select the General pane and review your Homepage selection. Then, select the Search pane and confirm your desired Search Engine. Repeat those equivalent actions for any other browser you may use (Brave, Firefox, or Opera for example).

• Specifically for Google Chrome: If you use it, you will also need to reset the Chrome product to its default settings. To learn how to do that read https://support.google.com/chrome/answer/3296214?hl=en

There may also be adware-associated app icons in your Mac's Applications folder. Open it and examine its contents. Any unwanted or mysterious app icons should be obvious to you, but again please don't remove anything if you are uncertain—ask first. Identify any suspicious apps by name, or post another screenshot.

Next: In an abundance of caution, examine System Preferences (or Settings) > Extensions. Determine if there are any System Extensions that may have been installed without your knowledge. Ask if you're uncertain.

Remaining in System Preferences, check for the presence of any Profiles. Profiles are installed by organizations with a need to manage Macs deployed in institutional corporate or educational environments (for example), but have also been exploited by adware creators and similar malcontents. If any Profiles are installed on your Mac an icon like this will appear in System Preferences:

If you see that icon in System Preferences, select it. To remove a Profile, select it, then click the [—] (minus) button and authenticate.

Remaining in System Preferences, open Users & Groups. Select your User Account's Login Items. You may or may not find those Applications in its list. If you do, select them then click the [—] (minus) button to remove them from Login Items.

You can then restart your Mac and log in as usual. Evaluate its operation and ensure everything is working as you expect it should.

Next: if you want to eradicate all remaining adware remnants post a screenshot of the following folder, in the same manner as you did earlier:

~/Library/Application Support

It is normal for that folder to contain many items, but anything associated with the above adware may contain identical names. If you find a folder or folders bearing those names, drag those folders to the Trash. Without the files you already removed or the reintroduction of similar malware, they can do nothing but occupy space. These can be removed if you wish, but again don't remove anything if you are uncertain.

Finally: If any of the above actions result in abnormal operation or if something else stops working, the easiest way to recover would be to restore the Time Machine backup you created as a prerequisite, so the importance of that fundamental step cannot be overemphasized.

alice_pozhidaeva, please be advised that if you are unable to start your Mac in "Safe Mode" you will either not be able to delete the required files, or the problem will return even after you delete them. With the understanding "Safe Mode" is a prerequisite for fixing the problem, follow the instructions below.

First, ensure you have a reliable backup of your Mac, in case something should go wrong with continued troubleshooting. To learn how to do that, please read Back up your Mac with Time Machine.

• A backup is a fundamental prerequisite regardless of whatever method you may choose uninstall adware, and would apply even if your Mac were running perfectly well. Do not overlook this fundamental requirement. It's important.

Next: This step will prevent the scam products from loading so that they can be removed while they are inactive. Restart in "Safe Mode", and log in: How to use safe mode on your Mac - Apple Support. Starting in Safe Mode takes longer than usual so let it finish. The rogue processes affecting that Mac are inoperative in "Safe Mode".

The following files and / or folders need to be deleted while using your Mac in "Safe Mode":

First screenshot:

Second screenshot (which is a continuation of the first):

Nothing needs to be deleted from the folder in the third screenshot.

Last screenshot:

Drag those selections of files to the Trash. You may be asked to authenticate. Confirm they are no longer present in that folder. Leave all the others alone for now.

Next: open Safari and select the Safari menu > Preferences (or Settings) > Extensions. If you see any Safari Extensions that you do not recognize or understand, simply click the Uninstall button and they will be gone. No Safari Extensions are required for normal operation. Then, select the General pane and review your Homepage selection. Then, select the Search pane and confirm your desired Search Engine. Repeat those equivalent actions for any other browser you may use (Brave, Firefox, or Opera for example).

• Specifically for Google Chrome: If you use it, you will also need to reset the Chrome product to its default settings. To learn how to do that read https://support.google.com/chrome/answer/3296214?hl=en

There may also be adware-associated app icons in your Mac's Applications folder. Open it and examine its contents. Any unwanted or mysterious app icons should be obvious to you, but again please don't remove anything if you are uncertain—ask first. Identify any suspicious apps by name, or post another screenshot.

Next: In an abundance of caution, examine System Preferences (or Settings) > Extensions. Determine if there are any System Extensions that may have been installed without your knowledge. Ask if you're uncertain.

Remaining in System Preferences, check for the presence of any Profiles. Profiles are installed by organizations with a need to manage Macs deployed in institutional corporate or educational environments (for example), but have also been exploited by adware creators and similar malcontents. If any Profiles are installed on your Mac an icon like this will appear in System Preferences:

If you see that icon in System Preferences, select it. To remove a Profile, select it, then click the [—] (minus) button and authenticate.

Remaining in System Preferences, open Users & Groups. Select your User Account's Login Items. You may or may not find those Applications in its list. If you do, select them then click the [—] (minus) button to remove them from Login Items.

You can then restart your Mac and log in as usual. Evaluate its operation and ensure everything is working as you expect it should.

Next: if you want to eradicate all remaining adware remnants post a screenshot of the following folder, in the same manner as you did earlier:

~/Library/Application Support

It is normal for that folder to contain many items, but anything associated with the above adware may contain identical names. If you find a folder or folders bearing those names, drag those folders to the Trash. Without the files you already removed or the reintroduction of similar malware, they can do nothing but occupy space. These can be removed if you wish, but again don't remove anything if you are uncertain.

Finally: If any of the above actions result in abnormal operation or if something else stops working, the easiest way to recover would be to restore the Time Machine backup you created as a prerequisite, so the importance of that fundamental step cannot be overemphasized.

alice_pozhidaeva restarting your Mac in "Safe Mode" is a prerequisite. Follow these instructions: Use safe mode on your Mac - Apple Support. If they are not successful, please describe the step that does not work, or that does not result in what you expect.

And, you need to inspect three separate folders.

The missing folder is either /Library/LaunchAgents or ~/Library/LaunchAgents. The last screenshot you posted is one of them, but you need to post the missing one.

All three are important.

For detailed instructions please read About those "<app> will damage your computer" messages - Apple Community.

Naya345 you first need to inspect three different folders. Erasing items in the folder in your screenshot will have no effect unless you follow my instructions from the beginning.

For updated instructions please read About those "<app> will damage your computer" messages - Apple Community.

It would be best if you were to post a brand new question, using the Ask the Community link above. That way, your question will get the attention you deserve.

Hi John, I hope you're doing well. I couldn't reply to you on a different thread so I opened a new discussion with my 3 screenshots. I would so appreciate if you could take a look at my folders. Thanks in advance!

Here goes the link to the discussion: "Pipidae" continuously popping up on my M… - Apple Community

SuetHo three different folders need to be inspected. One of them is missing from your reply. If it is empty there is no need to post a screenshot of it, but please confirm that it is empty.

For updated instructions please read About those "<app> will damage your computer" messages - Apple Community.

It would be best if you were to post a brand new question, using the Ask the Community link above. That way, your question will get the attention you deserve.

Hello! I got the same problem. Here you can see the screenshots.

One screenshot is missing from your post sharda0702.

You need to inspect these three separate folders:

/Library/LaunchDaemons

/Library/LaunchAgents

~/Library/LaunchAgents

The missing folder is one of the last two, either /Library/LaunchAgents or ~/Library/LaunchAgents. All three are important.

Hi already deleted all files and deleted them in trash also without the safe mode. Is it dangerous? Because the “ConnectionCachefld” will damage your computer is still popping up only when I start my computer.

If the message is still reappearing, then one or more files that should have been deleted still exist. They have to be deleted in "Safe Mode" because they will be inactive in that mode.

"Safe Mode" is a common computing expression, and is not strictly limited to Macs. Its opposite is not "unsafe mode"; it's just way to prevent system-modifying processes from loading when you start a computer in that mode.

Dear Team,

I am also facing the same issue. Request for your help.

I have deleted all the files from the folder "LaunchAgent" and "LaunchDaemon" folder but issue is still there.

Request for help.

Regards

Please read Removing "Search Marquis" / "Search Baron" / etc on your own - Apple Community, and post the three screenshots it describes in a reply to this Discussion.

"ConnectionCache.service.plist" needs to be removed.

Remember that you must restart your Mac in "Safe Mode" first. Otherwise, it will constantly reappear.

Please read About those "<app> will damage your computer" messages - Apple Community.