For those wanting some semblance of control over macOS system processes, consider experimenting with App Tamer ( https://stclairsoft.com/AppTamer/ ). I was sceptical about it but "rogue" system processes, like Spotlight Indexer / Engine, that randomly demanded and hogged 100% of the CPU is now a thing of the past for me, after I used App Tamer to set it to not use more than 20% of CPU resources. It can supposedly stop (kill?) processes too, and I am experimenting with that too. But yeah, I think it's time to dump macOS (thankfully, I am still using an older version so my experience is less shitty).