Chumsearch is a browser hijacker that takes control of Safari, Google Chrome and Mozilla Firefox and changes personal settings such as home page. It can be removed by following instructions below:
- Open Finder, then Applications. Look for Chumsearch and move it to Trash. Also move to trash all unknown and unused applications.
- Reset browser settings. Use the instructions (step 2) http://www.myantispyware.com/2015/11/21/remove-feelbegin-from-mac/#remove-extensions
If the Chumsearch malware is not removed, and you can not remove it yourself by following the instructions above, then use Anti-malware for Mac by Malwarebytes. Download Anti-malware for Mac from http://www.myantispyware.com/download/malwarebytes-anti-malware-for-mac . Run and scan your mac. Once the scan is done, click Remove Selected Items button.