Best way to revert to Sierra from High Sierra??

[davester]

Also, as long as you're upgrading, why not skip High Sierra and go to Mojave? That'll give you a tiny bit more futureproofing and will still run 32 bit apps. The only downside that I've encountered is that Mojave will give a warning the first time you run your 32 bit app that your developer should update the app (to 64 bit). After that it's smooth sailing as far as I can tell.