Hmm... That's a real shame if that's the case. Based on my understanding, it would seem pretty trivial, technically speaking, for the simulation to run continuously, while outputting a continuous stream of data.
For sure you can redirect (pipe) the output files to another program, so to emulate a live streaming, just that back then it was not designed to work that way (SPICE is ancient). SPICE is not like a DSP that can process a live datastream.
You can not just plug a soundstream into a SPICE simulation and expect to hear how the music will be after passing through your simulated circuit. However, you can record an audio, feed a SPICE voltage source with the recorded signal, then convert back the output of SPICE to an audio format, but I'm not aware of any SPICE distro doing that by default, you have to do it manually.
Some SPICE have some extra features, for example, LTspice can start plotting your charts during the analysis, and it keeps re-scaling the plots on the way, and so on.
However, once a simulation starts, the schematic is frozen, you can not change anything. The only features that can ad changes is related with parameters, but you can only predefine them, you can not change a parameter live, during simulation.
Another similar feature you may want to test is in QucsStudio (not SPICE based, but also a circuits simulator), has sliders and can run launch a new run in the background for each event coming from the sliders, which makes it appear "live" but it's not, it's just that the hardware nowadays is really fast so it can be abused that way by software, like this:
https://www.eevblog.com/forum/eda/qucs-qucs-s-and-qucsstudio-simulators-are-not-the-same-thing/ Unless you have a homework assignment to use SPICE in text mode, my advice is to use something else that is more productive, and comes with a nice GUI, like LTspice or QucsStudio. I absolutly love the interactive sliders from QucsStudio, they can help you build an intuition very fast about how your circuit behaves when you change different parameters. I use both LTspice and QucsStudio.
Both work on Windows or Linux (in Linux first you must install WINE, then it will work just like it would be on Windows), probably on MAC, too, but I never used the MAC version.