Find Serial Devices On macOS
Summary
On macOS, USB serial devices are usually checked through System Information and then selected in Rostoc. Macs do not use Windows COM port names.
Steps
- Plug in the machine or USB-to-serial adapter.
- Open System Information and check the USB section for the device or adapter.
- If the device is missing, try another USB data cable or USB port. Charge-only cables look identical but do not work.
- If the adapter requires a driver, install the driver from the manufacturer.
- Reopen Rostoc and choose the serial port the machine or adapter appears on. Rostoc lists USB ports first; the serial ports macOS creates for paired Bluetooth accessories sit behind Show all in the port list.