I have been using the calcpad200 calculator with my Mac for some time. I have been using other key pads from other brands as well.
It does not work well with Excel in Mac. It has some other issues even with Windows. There are no specific drivers, and found no support in the web. Key action is not as good as other competitors' - I am using Kensington's.
The basis for our offering is that HP calculators are better than other brands. In general, it stands true. Most of the current offering is better than the competition, and the quality is improving: just see the new HP10s+ and HP300s+. Therefore, in order to keep the level high, we have decided to remove it from our offer.