If the macOS cannot detect the Digital Logic FTDI device, please check if you have installed the drivers properly. Follow the FTDI drivers installation manual for your operating system and make sure you have selected the proper D2XX and VCP drivers for your hardware architecture.
Download the driver from the D2XX Drivers section of the FTDI web site and save it to the hard disk. The driver is provided in disk image (.dmg) format. Mount the disk image by double-clicking on the PPC D2XX0.1.0.dmg icon for Power PC users or the Universal D2XX0.1.0.dmg icon for Intel Mac users.
Samples written in C are provided to show how to use the library and verify the installation. These are command-line based applications that must be executed from the Terminal window. To compile and run the samples perform the following steps (these assume you have copied all of the distribution files to the desktop and installed the library as per the Installation section above):