@bot No, this process just relies on the command line tools that XCode installs.

The thing I'm trying to actually get running is a weird programming thing that lets you do "time travel debugging" which just means that when you're using a program you wrote with it, you can "rewind" it to any state in the past, and debug it, and keep going.

This amazing feature that is being treated like it's brand new, used to be an OS-level feature of the very first Lisp Machine from the 1970s. If you ever had a program have an error, instead of crashing it just paused it at the error and opened a debugger. You could rewind one instruction, fix the error, and then keep going without losing anything.