After the 2021-007 security update to Catalina 10.15.7 on my Macbook Pro, RStudio refuses to start. Other apps are also affected. Google Earth Pro, Stellarium at least. The common factor might be something to do with Qt.
When I first noticed this a few days ago, there was nothing on the internet. But now reports are starting to occur. Not heard RStudio mentioned yet. Hence this post.