IsoCON doesn't utilize a server model, just p2p connections, so it's not able to do async play currently. v0.8 (coming soon) will enable sessions to persist to a file, so it's theoretically possible if everyone connects at least once to get the token graphics synced. However it would involve passing around the session file and updating it, which is cumbersome and presents some other issues.
I'll keep async play options in mind for the future, but at the moment it isn't supported.
The current macOS builds are all done via platform emulation and I don't have a way to test them, so I'm not surprised. I'm looking into acquiring an actual macbook to do proper builds.
It seems that if your UI scale config make the patch notes modal larger than the window, it's impossible to close. I'll fix that in the next release. As a workaround, you can edit your config file (C:\Users\<username>\AppData\LocalLow\isocon\Isocon\config.dat) and set ReleaseNotesSeen like so: "ReleaseNotesSeen":"|0.7.0|0.7". Thanks for reporting this issue!
I keep changing the interface up so I don't have a video tutorial yet, but there are built-in tutorials for various elements. Maybe once it's out of beta! As far as a token library, Isocon doesn't come with any tokens but you can load any PNG from your device.
