Recently I see a lot of posts about good cables/adapters to connect Newtons with NCX on new MacOS (10.13, 10.14). So, I wish to share my experience and (I believe) simple solution.

Most of old USB to RS422 adapters have problems to work with modern MacOS. Usually there is a problem with drivers or adapters freeze etc. But some time ago I’ve found good cable with FTDI chipset, which DO NOT need any drivers for MacOS 10.11 and newer. This cable is made by UGREEN and have really good quality:

https://www.ugreen.com/product/UGREEN_Serial_Cable_USB_to_RS232_DB9_Male_A_Converter_with_FTDI_Chipset-en.html

This cable is USB to RS232 converter, so to connect Newton with your computer you need RS232 to RS422 cable to. But this second one is a standard cable to connect Newton with RS232 (Windows standard). Most of the Newton users should have that cable. If not, you need to buy it or make it on your own (very simple pin connection – will prepare info in separate post soon).

Then you need NCX app, which you can download from here: https://newtonresearch.org/connection/ After installation and connecting the UGREEN cable to your MacOS, you will see separate port in NCX app settings. You can connect your Newton with modern Mac now.

UPDATE: Sometimes NCX do not respond after closing connection with Newton. In this case you just need to close app and open it again.