How to disable Top Sites in Safari on macOS Lion How do I disable the auto-updating of the Top Sites in Safari?  I don't want to turn the feature off altogether, I just want to prevent auto-update.  I know this may seem like an attempt to defeat the purpose of Top Sites in the first place, but I find that if it auto-updates any of the Top Sites that are forum-based, all of the unread topics are marked as read.  So, an even better solution would be the ability to exclude the auto-update of certain URLs/domains, etc.  Does that functionality exist?
I found this somwhere else which may solve your problem:


Quit Safari
Open Terminal (Applications/Utilities) &amp; paste:

defaults write com.apple.Safari DebugSnapshotsUpdatePolicy -int 2


then hit return &amp; quit Terminal.


To reactivate:

defaults delete com.apple.Safari DebugSnapshotsUpdatePolicy