As to the safari issue, what is the version of the safari browser you're using?
Johny, which newsfeed you want to hide from guests: profile or index page newsfeed?As to the safari issue, what is the version of the safari browser you're using?
1. go here: www.yoursite.com/index/customize
2. click on the newsfeed gear icon in the right upper corner
3. click on the restrict view check box then unclick Guest option in Visible for user roles
3. save
if you want to hide profile newsfeed from guests
1. Go here: www.yoursite.com/profile/privacy
2. locate view my profile newsfeed option
3. in the dropdown menu choose my friends option
4. save
As to the Safari issue with the newsfeed, we have tested on our side and we cannot reproduce the issue,see attachment, can you please share your URL, so we could check on your website.