Please could you tell me if i need a firewall for this my MACBOOK PRO RETINA, it's slow to open unlike before. I'm not a heavy user & not good with computers. Thank you
MacBook Pro (Retina, 15-inch, Late 2013)
Select Macintosh HD as the Startup Disk.
“Set the default startup disk” http://support.apple.com/kb/HT1310
Reset PRAM. http://support.apple.com/kb/PH18761?viewlocale=en_US&locale=en_US
If you are using your Mac at home and you connect via a router to the internet (like a wireless router, which is probably what you have), then the router already has a firewall built in, and you do not need an additional software firewall.
If you are connecting to the internet on a public network, like over free wifi at some public place like a coffee shop, then it is a good idea to turn on the software firewall that is built in to OS X, which you access via System Preferences → Security and Privacy → Firewall.
But this probably doesn't have anything to do with your mac being "slow to open".
What is "slow to open"? Do you mean that your Mac is slow to boot up? Or is there some specific application that is slow to open?
macbook pro runs slow
