Here is the uncomfortable truth that Fiery documentation buries in footnotes:
Fiery Command Workstation 5.8 Download for Mac: A Complete Guide
Pro Tip: If your primary Mac is on a newer macOS, the most effective workaround is to set up a small, dedicated legacy Mac or run an older OS inside a virtual machine (like Parallels or VMware) specifically to host your CWS 5.8 interface. How to Get the Fiery Command WorkStation 5.8 Download