Hi there My father uses the voiceover on his MacBook Pro which was running OS X El Capitan but as of today is now running MacOS Sierra. When he visits some pages, such as Amazon or Wikipedia, and goes through the headings, he will encounter the voiceover every so often saying Safari Busy. At this point Safari will freeze and his only option is to come out of it and go back in. Which means reloading the page and finding where we last was. Not so straight forward when you rely on the computer to speak everything to you. Understandably he is getting rather frustrated by it and annoyed. It hasn't occurred on the BBC Web Site as of yet. I upgraded his laptop to Sierra swiftly, to see if that would help but alas it made no difference. I have experienced the Safari Busy myself on his MacBook Pro but I can't figure out what might be causing it. Has anyone else experienced his or know what might be causing it. It's only relatively recent but it occurring on both OSs.