Hello,
Kindly try performing the steps below as a workaround for the issue with the lack of network access inside a macOS Sonoma VM and share with me if it works for you:
1. Open Terminal.
2. Execute the command below (once done, it'll ask you for the Ma administrator password; please enter it and hit Enter to execute the command):
sudo nano /Library/Preferences/Parallels/network.desktop.xml
3. Locate the following string:
<SystemFlags></SystemFlags>
and paste the devices.net.use_naptd_for_macvm=0 value to make it look like this:
<SystemFlags>devices.net.use_naptd_for_macvm=0</SystemFlags>
Note: use arrow buttons on your keyboard to navigate.
4. Press Control and O buttons on the keyboard to save the changes and then hit Enter.
5. Press Command and Q shortcut to quit the Terminal.
Check if the issue remains. If it does, kindly reproduce the issue, and collect a technical report (right-click Parallels icon in Dock > Help > Send technical data > check "Attach screenshots..." > press Send Report) and provide us with the report's 9-digit ID in reply to this post.
