MacBook Air: Websites freeze during sign-in across browsers
Product: MacBook Air, M4 2025, Sequoia 15.7.3 - < 1 year old
Issue: Cannot sign in to websites like Ancestry and Tennis Channel via multiple browsers (Safari, Chrome, Firefox)
Description example 1: From a normal sign in screen (email, password) on Ancestry, you then click "Sign in" and after a few seconds it should jump to a new screen where you select how to receive a two-step verification code...but it gets stuck on the first screen with a spinning circle over the "Sign in" button.
Description example 2: Once getting through the sign in process to Tennis Channel, the screen states "Livestream starts soon", which is normal, but again in a few seconds, the broadcast should start in normal times. On this MacBook, the screen just freezes there.
On same WiFi network, the above attempts have worked on my M1 iMac (Sonoma 14.8.3) and a Lenovo laptop (Windows 11). AND when I updated the Sequoia OS a week ago, all of the above worked for one day. But it never worked before and it now doesn't work after.
Steps tried: Clear Cache & Cookies, Use Private Mode, Restart Mac - as far as I can see I have zero extensions. I don't have VPN or Security software. And Safari settings between iMac and MacBook are the same as far as I can see.
What needs fixing/changing when other computers work fine and no browsers on this MacBook allow me to move on in the sign in process on multiple websites?
