After 13.2.1 Ventura upgrade connecting to Mac mini no longer possible

Hey ChangeAgent,

Does the issue occur in a new user? This will help determine if the issue is related to settings: Set up users, guests, and groups on Mac - Apple Support

If you haven't already, try restarting all devices including your network.

Let us know! Take care.

Hi ChangeAgent,

Thank you for letting us know more.

To help us get a better understanding of the issue, we’d like to ask a few questions.

1. What exactly happens when you try to connect your other devices to your Mac mini now? Have you received any specific errors?

2. If you do receive an error, what does the error say?

The above details will help us plan how to proceed.

Please also check out the information in the following link on how to connect your Mac to shared computers and servers and ensure the correct process is being used, so we can make sure there aren't any issues there: Connect your Mac to shared computers and servers

Connect your Mac to shared computers and servers

You can connect to shared computers and file servers on your network, including Mac and Windows computers that have file sharing turned on, and servers that use protocols such as SMB.

You can connect by either browsing or entering the computer’s or server’s network address. See Find your computer’s name and network address.

Connect to a computer or server by browsing

1. On your Mac, click the Finder icon  in the Dock to open a Finder window, then click Network in the Locations section of the sidebar.

If no items appear in the Locations section of the sidebar, hold the pointer over the word Locations, then click the arrow .

2. In the Finder window, double-click the computer you want to connect to, then click Connect As.

If you’re connecting to a Mac that has screen sharing turned on, and you have the appropriate privileges, you can also click Share Screen.

3. Select how you want to connect to the Mac:

• Guest: You can connect as a Guest user if the shared computer permits guest access.

• Registered User: Connect to the other Mac using a valid login name and password. If “Only these users” is selected on the other Mac, make sure the login name you’re using is on the list of allowed users.

• Using an Apple ID: Connect to the other Mac using an Apple ID. You must be set up in Users & Groups settings with this Apple ID, on both this Mac and the other Mac.

4. If necessary, enter your user name and password, then select volumes or shared folders on the server.

In some cases you need the network area or workgroup for the shared computer. If you don’t have this information, contact the computer’s owner or your network administrator.

Tip: To make it easier to connect to the computer in the future, select “Remember this password in my keychain” to add your user name and password for the computer to your Keychain.

Thanks!

Hello ChangeAgent,

Thanks for getting back to us with that information. It’s appreciated.

Since the issue persists, we recommend reaching out to Apple Support to look into this with you further: Get Support

All the best.

I have tried restarting all devices. Tried connection with wifi and with an internet cable. The interconnectivity between my three Macs has gone. There is something seriously wrong with the latest update. If you haven't upgraded wait until Apple have sorted the issue.