I have two guesses as why Roblox Studio for MacOS has never been as up to spec as it is for Windows.
The first guess is that Roblox Studio for MacOS just isn’t being tested to the same degree as Roblox Studio for Windows. If this was the case, you wouldn’t have to deal with glaring issues such as the script editor not working properly because it would never fly by any competent QA team.
My second guess is that Roblox Studio didn’t start off with having a good library for cross platform development; instead of doing their homework, the team responsible for porting Studio jumped off into the void and started filling in the platform gaps on their own, building their own cross-platform library. This doesn’t sound that bad, but you’re going to have to consider that for every feature basically double work has to be done. Since support for MacOS probably “isn’t as important” as support for Windows because MacOS has a smaller user base, the MacOS side of things is going to get less work put into it. There most likely are software libraries out there that would allow Roblox to fix this possible problem, but it would involve uprooting the entire application, which is probably too expensive.
In any case, Roblox still has “Beta” plastered all over it in writing and to some degree the quality of the software lives up to this claim. Honestly, Roblox is in a situation where it shouldn’t be rolling out Beta-quality software on any platform.
Even if these guesses of mine are true or not, you’d be probably hard pressed to get any real answers as why you’re not getting the same level of support, which you deserve. If you get an answer, you’ll probably get a response along the lines of “our team is working very hard on these issues, please stand by”. It’s up to you if that’s acceptable. In my opinion, if a company promises support for a platform by releasing for it, it should be up to spec, no excuses.
I’m sorry if my wall of text comes across as being a bit stingy, but I think it is some deserved criticism.