I sent in a ticket awhile back noting that Studio One crashes on startup with the High Sierra OSX public betas. I wanted to add , given that the GA release is September 25 - next week - that this is still occuring with the "Golden Master" version that Apple has finalized.
For the record, I tried to run Studio One on every one of the 9 "pre-GM" public betas. Oddly, it worked ONLY with PB8. When PB9 was released, we are back to the crashing etc.
I'd recommend you post an upgrade warning to Mac users while you address the issue, especially if you don't expect to resolve this by release day. What will happen is that we won't be able to upgrade without coming to the support area and downloading - because startup will never occur.
I remain willing to test builds, and or provide my crash logs (which I did previously) if these will be helpful. I hope the product will support High Sierra quickly.