Hi buzzrobert,
We appreciate you reaching out to us. We understand that since you updated to macOS 10.15.7, you are experiencing issues logging in to your bank using Safari. However, you can log in to your bank when using a different browser.
We’d like to gather additional details that may help us be in a better position to assist you.
Are you receiving an error message when going to your bank's website?
Are you receiving an error message when logging in?
Have you had the chance to use a different Wi-Fi network?
We recommend that you check if the issue persists while on safe mode. Below is an article to help guide you through the process.
How to use safe mode on your Mac
Also, we recommend that you check if the issue persists when signed in on a different user account. The article below can help if you do not have any other user account to test with.
Set up users, guests, and groups on Mac
Take care!