On macOS Sequoia (15.x), the port of the machine being connected may not appear in the LAN communication port of FineCut/Coat9.
The following is information on how to deal with this case.
Products:
■FineCut/Coat9 for Illustrator Ver.3.3 (Macintosh)
How to deal with it
1. Open "System Settings" from the Apple menu
2. Open [Privacy & Security]-[Local Network]
3. For Illustrator which you use, set the local network access on
The procedure is now complete.
Make sure that the serial of the machine being connected is displayed on the FineCut communication port.