Hi Jon, Long time!!!
Yes, indeed! 
Hope you’re well, and thanks for chipping in with feedback
That version is working fine so far (ran a few of the demos).
So that’s great. I’m still puzzled why the error didn’t occur for everyone, but it’s some good news to know it’s fixed for most.
taking forever to measure refresh rate
This is to do with very inconsistent (reported) frame intervals on macos making it impossible to find a consistent rate. I think that issue warrants a discussion thread that I’ve started here
@pal217 I wonder if your issue is different then. Could you try moving your user/app settings and (to reset your prefs and plugins)" Shut down the app and then do
mv ~/.psychopy3 ~/.psychopy_backup
in a terminal
@storrisi I think you’re trying to run a script using a deprecated movie class without installing the relevant plugin. Either switch you taps to use the new Movie backend or install the psychopy-legacy plugin
