After testing and playing around with C3, here is my second impression.
I work on a Celeron N3050 (8GB ram, 850gb SSD and Intel graphics) laptop with Linux Mint, and Construct 3 feels laggy to me.
C3 feels laggy on my iMac too, but I couldn't tell if it's because Mac gets limited support for Chrome or if it's just C3 itself. I don't normally run web apps in Chrome, so I don't know. I know my Mac specs far exceed the requirements though.
I'm still trying to overcome my disappointment with C3's reliance on Chrome. When it was announced years ago that C3 would be cross platform and run on a Mac, this is not what I expected. It doesn't really solve the problem, because Chrome is the problem. It's like being promised a new car, but when you get it, it has square wheels and you can't ever change them. Sure you can drive it, but it will be a slow and bumpy ride.
There are a ton of great things I like about C3 too, so it's not all negative, but user experience isn't great for Mac users, and it always comes back to Chrome for me. The desktop version was promised, so I wonder if it will fix the issue of relying solely on Chrome, or will it come with it's own set of limitations?