"Sharing" issue on Catalina

Hello,

I have no issues between my iMac running High Sierra and my MacBook running Monterey when my setups are as follows

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- Have a good day, good evening.. ;-)
- iMac 2011 - MacBook Air M1

Hello Francis,

Very happy to see you on the site; hope you’re doing well.

1. Regarding the problem below

"However, in 'Preferences/Sharing'
I can't check the 'Sharing' box and therefore 'Options' is inoperative
Catalina bug? Configuration error?"

I made the decision to do a clean installation on my MacBook Pro 13" by reinstalling Catalina and so the problem disappeared.

2. As for file sharing between the Macs, the problem is almost resolved, as they can recognize each other well. However, my Cartesian mind is shaken by the following observation.

To achieve this small miracle, I have to validate a bizarre number of different users proposed in 'Sharing' 'Users+" ; I notice that the same computer is recognized by a different username depending on the computer being configured.

See below

In the 'Sharing' 'Users' section of each of the 3 computers, I have a multitude of proposals including

“com.malwarebytes.mbam.nobody” name proposed by the iMac 27” what is that ????????

“toto” name proposed by the iMac 27” computers. It’s the name of a troubleshooting session following an “Admin/Standard” issue encountered with the iMac 27”
“MacBook Pro de Soline” name proposed by the iMac 27” and MBP 13”
“MacBook pro de Laurent” name proposed by the iMac 27”
“MacPorts” name proposed by the iMac 27”
“Laurent Lxxxxxx macport” name proposed by the MBP 13” strange because it’s the name of the MBP 13” session
“Administrators” or “Administrators” name proposed by the MBP 13” and the MBP 15”
“iMac-de-Laurent” name proposed by the MBP 13”
“Laurent” name proposed by the MBP 13”
“Everyone” name proposed by the MBP 15”
“macport” name proposed by the MBP 15”

And it's pretty much the same "mess" for the permissions and file sharing authorizations, with the addition of "everyone," "staff," "guest," depending on the OSX versions.

To conclude

The session names assigned at logon for the computers are

“Laurent” which is the logon name for the iMac 27”
“Soline” which is the logon name for the MBP 15”
“Laurent Lxxxxxxx macport” which is the logon name for the MBP 13”

Go figure! I'm now looking to simplify all this so that the only choices for one computer are the names of the other two.

Thank you and see you soon on the thread

Sincerely
profiler31 (Toulouse)

This is what I do, and through successive trials, I know which ones are essential for the proper functioning of each Mac compared to the other two.

But these names remain in memory and are still proposed to me in "Sharing," and in the "permissions/preferences," it is impossible to delete "everyone," for example.

Could it be due to the coexistence of 3 different OSX versions?

I'm still looking, and if I find anything, I'll keep you updated.

Have a good end of the day, a good evening, and see you later!

Sincerely,
profiler31 (Toulouse)

OK Seen and read, thank you very much

Best regards
profiler31 (Toulouse)