Our Mac OS X software is distributed as Zip (.zip) and MacBinary StuffIt files (.sit.bin). You need
the free StuffIt Expander to decompress
the ".sit.bin" or ".sit" files. If you have Mac OS X 10.3 or later, you can open the ".zip" files without any additional software. Your web
browser may be already set up to decode and decompress these files automatically.
If not, you can drag and drop the ".sit" file you download onto the StuffIt Expander
icon once the download is complete. In Mac OS X 10.3 or later, ".zip" files can be decompressed by double-clicking their icon once the download is complete.
Click here to download software for older 68K Macs.
1 Note to customers upgrading from 1.x versions of Periodic Table:
Periodic Table version 3.5.2 is free for all registered users; however, if you have a
registration code for a 1.x version, you need to contact us
to receive a new code. Please include the name/company you registered
the software under before, and the old registration code if possible.
2 Some features are disabled in the Alchemist's Challenge, ConverTable Units, ChemDuet, Periodic Table, and UpTime Log software until you register them ($12-20 for a single-user license).