There is a "Catacomb" folder in my Macintosh HD > Library

Created at: 2021-05-13 08:42:26
Questioner General

I was looking through my /Library folder and I saw this folder named "Catacomb". I couldn't find much good info on it on the Internet. On another Apple Support Community discussion, many people claimed it is malware or the result of a hack. Is this true? And if not, what is it doing there and what is it for? Also, if it is actually malware or a hack please tell me what to do about it. Here's a screenshot of the folder in /Library:



I looked inside and I found a folder with the bazar name "C69CEF54-AA18-53F6-A5E0-0113BA451D19". I opened it and here is what I found:



There were files called "biolockout.cat", "master.cat", "user_000001f5.cat", "user_000001f6.cat", "user_000001f7.cat", and "user_000001f8.cat". I have no idea what these files are. Here's what the "master.cat" file looks like:



Weird.

Answer #1:

By: Silas Raynor

I was looking through my /Library folder and I saw this folder named "Catacomb". I couldn't find much good info on it on the Internet. On another Apple Support Community discussion, many people claimed it is malware or the result of a hack. Is this true? And if not, what is it doing there and what is it for? Also, if it is actually malware or a hack please tell me what to do about it. Here's a screenshot of the folder in /Library:



I looked inside and I found a folder with the bazar name "C69CEF54-AA18-53F6-A5E0-0113BA451D19". I opened it and here is what I found:



There were files called "biolockout.cat", "master.cat", "user_000001f5.cat", "user_000001f6.cat", "user_000001f7.cat", and "user_000001f8.cat". I have no idea what these files are. Here's what the "master.cat" file looks like:



Weird.

Answer #2:

By: Prof. Giovanna Schultz III

It's not malware, but I can't remember its purpose.

Based on the names and some of the content, it may be something related to Touch ID.

Answer #3:

By: Arden Renner

Nicholascronan wrote:


I was looking through my /Library folder and I saw this folder named "Catacomb". I couldn't find much good info on it on the Internet. On another Apple Support Community discussion, many people claimed it is malware or the result of a hack. Is this true? And if not, what is it doing there and what is it for? Also, if it is actually malware or a hack please tell me what to do about it. Here's a screenshot of the folder in /Library:
https://discussions.apple.com/content/attachment/74f6f6a5-f4b3-4817-8b96-299baf230903


I looked inside and I found a folder with the bazar name "C69CEF54-AA18-53F6-A5E0-0113BA451D19". I opened it and here is what I found:


https://discussions.apple.com/content/attachment/97fbda67-7332-4393-ac8f-4cf1abaecd48


There were files called "biolockout.cat", "master.cat", "user_000001f5.cat", "user_000001f6.cat", "user_000001f7.cat", and "user_000001f8.cat". I have no idea what these files are. Here's what the "master.cat" file looks like:


https://discussions.apple.com/content/attachment/8ee003ef-8f68-44c3-9a16-7743fbca25a2


Weird.





Barney-15E remembered correctly...



The file name is not so "bizarre" it appears to be in the format of (UUID) a 128-bit number used to identify information in computer systems.



You can see your current UUID from >System Preferences>Users & Group> Control click on your admin account name to see>Advanced Options



ref: 2017 you can search "Catacomb" after the jump

https://duo.com/decipher/you-got-the-touch-first-impressions-of-the-2017-macbook-pro





In Catalina and Big Sur System files are locked, and I highly doubt you can delete it even if you wanted.



I suspect this came forward in migration assistant or some such. You can safely ignore.



About the read-only system volume in macOS Catalina - Apple ...





I will add— your user is the ~/Library is Finder>Go>Go To Folder>Library if it is not in your Finder side bar you can put it there or hold the option key and click on Finder>Go drop down menu>Library



This is your Library and you have r/w privpriveledgese.



There is real no need to be poking around in /Library or System/Library there are 100's /1000's of things you will no nothing about and have no business.



Answer #4:

By: Berry VonRueden Jr.

It's not malware, but I can't remember its purpose.

Based on the names and some of the content, it may be something related to Touch ID.

Answer #5:

By: Dr. Katrina Ankunding I

Nicholascronan wrote:


I was looking through my /Library folder and I saw this folder named "Catacomb". I couldn't find much good info on it on the Internet. On another Apple Support Community discussion, many people claimed it is malware or the result of a hack. Is this true? And if not, what is it doing there and what is it for? Also, if it is actually malware or a hack please tell me what to do about it. Here's a screenshot of the folder in /Library:
https://discussions.apple.com/content/attachment/74f6f6a5-f4b3-4817-8b96-299baf230903


I looked inside and I found a folder with the bazar name "C69CEF54-AA18-53F6-A5E0-0113BA451D19". I opened it and here is what I found:


https://discussions.apple.com/content/attachment/97fbda67-7332-4393-ac8f-4cf1abaecd48


There were files called "biolockout.cat", "master.cat", "user_000001f5.cat", "user_000001f6.cat", "user_000001f7.cat", and "user_000001f8.cat". I have no idea what these files are. Here's what the "master.cat" file looks like:


https://discussions.apple.com/content/attachment/8ee003ef-8f68-44c3-9a16-7743fbca25a2


Weird.





Barney-15E remembered correctly...



The file name is not so "bizarre" it appears to be in the format of (UUID) a 128-bit number used to identify information in computer systems.



You can see your current UUID from >System Preferences>Users & Group> Control click on your admin account name to see>Advanced Options



ref: 2017 you can search "Catacomb" after the jump

https://duo.com/decipher/you-got-the-touch-first-impressions-of-the-2017-macbook-pro





In Catalina and Big Sur System files are locked, and I highly doubt you can delete it even if you wanted.



I suspect this came forward in migration assistant or some such. You can safely ignore.



About the read-only system volume in macOS Catalina - Apple ...





I will add— your user is the ~/Library is Finder>Go>Go To Folder>Library if it is not in your Finder side bar you can put it there or hold the option key and click on Finder>Go drop down menu>Library



This is your Library and you have r/w privpriveledgese.



There is real no need to be poking around in /Library or System/Library there are 100's /1000's of things you will no nothing about and have no business.



Answer #6:

By: Kylie Frami Jr.

Ok.