In this case, Google’s two-factor authentication is the culprit behind the MacOS 10.15 Gmail bug.
Google can perceive an OS or hardware upgrade as some security threat, and they can respond by shutting off the connection to your account temporarily. The Common Issues of macOS 10.15 Gmail and How to Fix Problem 1: Google Security Checks In this piece, we examine the 5 most common Apple mail and Gmail issues on Mac OS 10.15 and the best solutions for them.
They can creep up because of the new OS upgrade, hardware upgrade, wrong settings, etc. Apple mail and Gmail issues on MacOS 10.15 can get you tangled up during a routine login due to a multiplicity of factors.
