Oldest OS Possible?

So at the moment I'm running the latest version of Indigo on Mojave, but despise the current version of iTunes so much I'm considering going to an older version of the MacOS and find a version of iTunes that I actually like.

Of course, I realize the future is impossible to predict, and at any moment, an update to Indigo will stop working on older OS's, but does anyone know for sure what is the oldest version of the MacOS that the newest version of Indigo will run on ?

Even if older versions will work, I'm going to wait for the new iTunes on the new OS to see if Apple actually fixes anything, but have no doubt it will still be the un-logicial, not-user-friendly mess it is today.

[jay (support)]

From the Downloads page (as of 7.3):

Indigo requires Mac OS X 10.7.5 (Lion) or greater — any Intel-based Mac capable of running Lion will work.

This most likely won't change for v7.4, but all bets are off after that.

Just remember that a lot of plugins that talk to cloud services don't work on anything earlier than High Sierra.