Sa9123l Driver Updated -

The SA9123L works with the built-in pl2303 module, but an update may be needed:

sudo apt update
sudo apt install linux-modules-extra-$(uname -r)
sudo modprobe -r pl2303
sudo modprobe pl2303

Check with: dmesg | grep pl2303

Older SA9123L drivers (pre-2015) lack digital signatures. Modern 64-bit versions of Windows block unsigned drivers. An updated driver includes a valid signature. sa9123l driver updated

Apple removed native support for PL2303-derived chips. Use the open-source driver: The SA9123L works with the built-in pl2303 module,

Older drivers limited baud rates to 115200 bps. Updated drivers support up to 3 Mbps (depending on hardware). Check with: dmesg | grep pl2303