You could have downloaded Keyspan USB PDA Adapter 2.5 for Mac from our application library for free. This free Mac application was originally developed by Keyspan.
From the developer:
Keyspan USB PDA Adaptor contains the drivers to connect to PDA to your Mac via your USB port.
You may want to check out more software for Mac, such as Wireless USB Adapter for Mac, Adapt A Dock or Vst To AU Adaptor V, which might be similar to Keyspan USB PDA Adapter.
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Device Assistants