I can't find my Mac in LAN

[Lesheque]

Hi, All,

I have brought home my iMac with newly reinstalled Catalina on it from the repair shop. Then I wanted to copy some files from the Mac Pro I have connected to the same home LAN. Unfortunately, I cannot find my newly set up iMac in network environment. I can see Mac Pro from the iMac, but I cant't see iMac from Mac Pro.

I Googled around a bit and found a hint, that I have to check the "File Sharing" option first (on the screenshot it's in Polish), but I can't. The checkbox is not clickable...

I'm stuck and desperate, because on Monday I have to take the Mac Pro back to the office and I need these files on my private machine to be able to continue working on them. They are huge enough to make copying them via usb stick at least problematic...

The system firewall is disabled, both computers have the same workgroup name.

Here's my system details:

Any idea will be hugely appreciated!

 

[chabig]

The checkbox is not clickable...

Did you unlock the preference pane?

 

[2paulk]

Experiencing the same issue, there is not lock on the bottom left corner of the pane.

 

[chabig]

Try rebooting the computer. If that doesn’t fix it you can airdrop files between the machines, no USB stick required.

 

[Lesheque]

@chabig I wish it was that simple . Rebooted several times so far.

 

[chabig]

Is there anything non-standard about your OS? Have you modified it it any way?

Sometimes, weird things like this will “fix” themselves if I run the routines in the Onyx Maintenance tab.

Titanium Software | Operating System Utilities for Mac - OnyX

OnyX is a multifunction utility that you can use to verify the startup disk and the structure of its system files; run tasks of cleaning and computer maintenance; configure some hidden parameters of many Apple applications; and more.

www.titanium-software.fr