How do I remove istartsurf from MacBook Pro?

1. Force Quit .

Press command + option + esc keys together at the same time. Wait.

When Force Quit window appears, select Safari if not already.

Press Force Quit button at the bottom of the window. Wait.

Safari will quit.

2. Relaunch Safari holding the shift key down.

3. Turn off wifi and turn it back on.

Turn off Wifi. Click Wifi icon in the menu bar and select “Turn Wifi off”.

Visit another website.

You won’t have internet connection.

Turn on Wifi. Click Wifi icon in the menu bar and select “Turn Wifi on”.

Select your Network.

4. Safari > Preferences > Privacy

Cookies and website data:

Click “Details” button.

Remove the cookie related to this, if there is one.

Additional steps

1. Safari > Preferences > Extensions

Turn those off and relaunch Safari.

Turn those on one by one and test.

2. Safari > Preferences > Search > Search Engine :

Select your preferred search engine.

3. Safari > Preferences > General > Homepage:

Set your Homepage.

For more info:

http://www.thesafemac.com/eliminating-browser-redirects-and-advertisements/