App for Blocking Website in Safari (For Productivity Purposes)
Solution 1:
SelfControl is a free app that will let you enter the websites you want blocked and for how long you want them blocked for.
Solution 2:
WasteNoTime is a good app for this. It is a browser extension.
Solution 3:
I'm currently trying Mindful Browsing and I really like it. It's very simple to setup and does the job perfectly.
Check out the website: http://www.mindfulbrowsing.com.
Solution 4:
Cold Turkey seems to work quite well and is free (although you have to pay if you want the schedule functionality)