Mac Mail issue

Sorry - I thought it was clear enough. After my Mac was automatically upgraded to OS 11.5.2 two nights ago, my gmail account no longer recognized my computer, and therefore I could neither send nor receive mail from my Mac. My iPhone continued to receive my mail just fine, but that's not incredibly helpful.

Since posting my question, I've had to go through all sorts of gyrations to try to fix this. iCloud and Google did not recognized my "device," and thought I was a poser trying to break into my own accounts. I've had to go through steps to confirm that this is me on my device, and it has generally corrected the issue. Periodically though, my mail icon will begin to bounce again, alerting me that it cannot connect. I've simply been hitting "cancel," and the problem goes away again. Weird.

Yes, thank you. I went through all of those processes, and after more than an hour of frustration I seem to have sort of cobbled things back together. And yet still, every 10 minutes or so my Mail icon begins to bounce, alerting me of a problem. When I open Mail I see a small window noting that the system "Can't connect to the account 'Gmail'", and prompting me to again enter my password. I enter my password, and am immediately told that they were "Unable to verify account name or password." I simply hit "cancel," and my mail works for a few more minutes. That's how I've been notified of your responses, for example.

What gives??

Likely so. What's frustrating is the fact that this issue with my Gmail-to-MacMail issue only began after the automatic operating system upgrade, so I am left to presume that the upgrade was the trigger event.