Unwanted search engine extension

You have adware/malware installed. Use  Malwarebytes Anti-Malware for Mac. It may be necessary to run more than one scan.  After scanning a couple of times, restart the computer and test. If necessary, follow the manual instructions.  Do not download any other programs that are listed in the articles.  

Search.serachpulse,net uninstall

Also check Safari/Preferences/General to see what your Home Page is set to. If Searchpulse, change it.

Safari Homepage setting greyed out       https://discussions.apple.com/thread/8637822

Then check System Preferences/Profiles to see if there are any you didn’t install. Delete them.

Hi rosecomber17,

Welcome to Apple Support Communities. I understand you'd like to use Google as your primary search engine in Safari and in Google Chrome.

Customizing the search engine to your personal preference is an important feature in the macOS operating system. I'll be happy to help.

You can adjust and change the search engine to Google by following the steps outlined in this helpful article: Customize searching in Safari on Mac

To adjust the search engine for Google Chrome, I suggest following the steps outlined on Google's website in this link: Set your default search engine

Please let us know if that helps.

Kind regards.