Two-finger scrolling not working reliably on mail messages in OS X Catalina 10.15.6 but works on other apps. I have MacBook Pro 2018. Problem has persisted for a year or more. I've force-quit Mail, rebooted OS X many times. 1-finger and 3-finger gestures work fine. 2-finger scroll does not, almost half the time. This only happens with Mac Mail app.
MacBook
Does this occur for a different user, e.g., Guest? How to test an issue in another user account on your Mac.
Does this occur after starting up in Safe Mode?
Consider the possibility of a third party software conflict. EtreCheck can be used to investigate what is installed. You can post the report here. Someone might spot something.
Is there any pattern to the messages that do not work properly? Does it happen that a given message works fine sometimes but others not? Do the offending messages have lots of graphics, html, fancy formatting? What exactly happens when the scrolling isn't working properly? No scrolling at all? Intermittent scrolling? Etc?
This doesn't seem to be the whole report. And you should give etrecheck "full drive access" when you run it.
Interesting. It sounds like the emails are being created/sent in a particular way which somehow bamboozles the Mail program. It could be a deficiency in Mail; it could be that the mail sender is breaking some rules. Maybe someone with knowledge of the inner workings of mail can chime in here. I've never encountered such a problem with any mail I have ever received.
Two-finger scrolling not working on mail messages in OS X Catalina 10.15.6 but works on other apps
