HP-48 - Mac Connectivity (2023)

[Mark Power]

Not all USB to RS232 cables have the correct chipset for Mac compatibility. I use this one:

StarTech.com 1 ft. USB to RS232 Serial DB9 Adapter Cable with COM Retention - Up to 920 kpbs USB to RS232 Adapter (ICUSB232PRO) https://amzn.eu/d/bD9eh9m

Connect that to the HP48 cable. Add a USB-A to USB-C adapter if needed.

I use Kermit in a terminal (use homebrew to install Kermit) or the Hoppi app (which doesn’t have all the features of real Kermit but is fine for file transfers).

This setup works on my 2015 MbP and 2022 MbP (M1).