blocking a website on a mac
I found an easy way to block a website :
1. open spotlight and search for Terminal
2. Open terminal
3. sudo su – Â Â and type your password
4. From the root prompt type  vi /etc/hosts
5. At the end of the existing text, type 127.0.0.1 , a space and then the site you want blocked, like this
….
127.0.0.1 WWW.BLOCKEDSITE.COM
127.0.0.1 BLOCKEDSITE.COM
6 save the file by type  :wq!  – this saves the file
7. Clear the cache of the browser and try navigating to blocked site.Â
8 . type exit on the terminal and then close it.
Any application that access the site will also be blocked. Â If you want to remove the block, follow the same steps , and remove the lines you added above.