If it works great over Windows, that's fine but I cannot recommend Notion 6 for Mac users. Too much of it including the playback engine is still 32 bit. Fender told us that Notion 7 was "coming soon", back in November 2021. They could have made Notion 6 64bit in the mean time. I am not holding my breath. My crystal ball predicts that we will never see Notion 7 — I'd be happy to be wrong.
I'm in the process of moving all my software over to a new computer, so I've been assembling a long list of how to reinstall my many programs and sound libraries.
By coincidence, I was just getting around to Notion. I'm running Notion 4, and even for $50 don't see a compelling reason to upgrade to Notion 6.
One of the main reasons I was interested in Notion was that it integrated with existing libraries, like Garritan Personal Orchestra. That was back in the days where I had close to no spare money, and I leveraged the purchase of some other music notation program I'd gotten cheap from an auction site into a Notion crossgrade.
But I never found the built-in sounds that great, and Notion 4 seemed to work less well with third party libraries. The focus seems to instead be on integration with Studio One and nothing else.
It looks like I can't even buy the libraries that work with Notion without also getting a Studio One subscription. I tried to double-check that, but after ten minutes, I can't even
find the Notion Expansion Sounds on their site again.
I'd be happy to upgrade if there were a reason for paying for a Notion upgrade, but as it is, I'll keep using Notion for the ease of use, but probably move on to Muse Score, which has much better built-in sounds.