icesugar-pro

>I derived from a clock running at twice the speed aah, so CFG_ENABLE_20MHZ runs cpu at 10. I was surprised you could run the bus at 20MHz with this FPGA devboard, 10 makes more sense. As I touched on that in HaD comment this is not a good devboard :( It has terrible pinout https://github.com/wuxx/icesugar-pro/tree/master/schematic all 100 signals huddling together in the middle with only 9 ground pins among them. Very bad for signal integrity. Whats worse someone in China actually decided to sell it commercially :( Luckily you made it work.

Commercial development toolchains such as Vivado or Quartus require a Windows or Linux system. For me, it's easier to simply set up a separate Linux machine for FPGA development instead of setting up a VM. However, you can use the open source Symbiflow toolchain (https://symbiflow.github.io) to develop Verilog-based systems (there's also a VHDL frontend now AFAIK) for Xilinx 7-Series, Lattice iCE40 and ECP5 FPGAs directly on macOS. For symbiflow, I would recommend a Lattice-based board such as the ulx3s (https://radiona.org/ulx3s/) or icesugar-pro (https://github.com/wuxx/icesugar-pro), but the Xilinx Arty-7 boards also seem to be supported now.