I got tired of having to run Virtual PC to program Stamp chips, and Parallax finally released a PBasic tokenizer library for the Mac. So I wrote a Stamp programming app for Mac OS X. It works. And you can use it with either the DB9 equipped Keyspan serial adapters (USA19, USA19x, etc.) or the Keyspan with the two small round connectors (USA28, USA28x, etc.). It also works with FTDI chip based adapters and Parallax' USB Board of Education (but see this FAQ).

system requirements

• Parallax BS2, BS2e, BS2p, BS2p40, BS2pe, or BS2sx Basic Stamp chip
• Mac OS X 10.2.8 or newer
• If you're using an RS-232 based board, the Keyspan USB to Serial adapters (either the USA-19 family or the USA-28 family) have been tested and are known to work. You'll need version 1.4 or newer of the Keyspan driver (works with both adapters, download it here)

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  Here is a table of other serial adapters I have tried.
• If you're using Parallax' new USB Board of Education, or an FTDI based USB-Serial adapter, see this FAQ