Keyspan SX Pro
Download Keyspan SX Pro 2.0 for Mac from our website for free. The actual developer of this free software for Mac is Keyspan.
From the developer:
Keyspan SX Pro Drivers should be used with the Keyspan SX Pro serial card. This card is a PCI card that adds additional 4 serial ports to your computer.
You may want to check out more Mac applications, such as RiffMaster Pro, Sequel Pro or PDF Reader Pro Free, which might be similar to Keyspan SX Pro.