How to turn off message webinar pop-up on MacBook Pro

deflumeri wrote:

how to turn off message webinar pop up on MacBook pro tahoe OS

? message webinar pop up ... is there a specific app involved here(?) a browser???

Maybe a screen shot would explain more...(?)

What happens if you quit all apps and then restart your mac?

ref: ref Block pop-up ads and windows in Safari

Block pop-up ads and windows in Safari - Apple Support -Apple Support

Readers here have substantial knowledge of how to turn off every kind of message that comes up. Each explanation ands up being small pamphlet worth of writing.

if you can take a photo of your screen and include it in a post, or take a screenshot and include it in your post, then Readers will know which or the many procedures you need.