An install request for a new helper app appeared, I entered my system password to download the app. Since then safari will not open. It just comes up with a safari quit unexpectedly report. I have tried logging on as a Guest but it does the same.

Question

I have a MacBook Pro with OS X Yosemit.  MY safari will not open, it only comes up with a safari quit unexpectedly report.  A new helper app appeared requesting my system password to download the helper.  Stupidly I input the password, when I log off I can see the download icon for a split second still running asking to abort or continue.  How do I sort this?
cheers

Answer 1

Genieo Adware is installed.  Removing it will help.
If you have another browser installed, use it.
If not, launch App store and get another  browser for temporary use.
Remove it afterwards.
1. Use  free  AdwareMedic by clicking “Download ” from here
    http://www.adwaremedic.com/index.php
    Install , open,  and run it by clicking “Scan for Adware” button   to remove adware.
    Once done, quit AdwareMedic by clicking AdwareMedic in the menu bar and selecting
    “Quit AdwareMedic”.
               or
    Remove the adware  manually  by following the “HowTo” from Apple.
    http://support.apple.com/en-us/HT203987
2. Safari > Preferences > Extensions
     Turn those off and relaunch Safari to test .
     Turn those on one by one and test.
3. Safari > Preferences >  Search > Search Engine :
    Select your preferred   search engine.
4. Safari > Preferences > General > Homepage:
     Set your Homepage.