when I search safari it comes up with remarksearch.com is not private

..LadyBrighton:

Perhaps the link to where 'Malwarebytes for Mac' may be downloaded.

It works, with macOS El Capitan 10.11.6; from Malwarebytes for Mac?

See if these instructions may help with installation & use. Also there's no

need to buy or un-install Malwarebytes; after14-day free full version trial.

It remains useful & gets a few updates; in a further 'workable' capacity.

[Note instruction #14 for reference to free version; the first time you get

and run free 14-day full version trial, on expiry, a 'free' version remains.]

• Download and install Malwarebytes for Mac - Malwarebytes Support

https://support.malwarebytes.com/hc/en-us/articles/360038479294

Details address the installation and should provide an El Capitan version.

..Another note: where one may learn to look for other items either left behind

or causative agents that aren't fully adware or malware. [by T.Reed]

https://forums.malwarebytes.com/topic/236261-how-to-remove-the-after-effects-of-adware

• Using EtreCheck - Apple Community

https://discussions.apple.com/docs/DOC-6172

A good free version of EtreCheck utility (this developed by contributor

to ASC of long standing; can be useful and can still be run in El Capitan.

My Mac had that one until few months ago, then upgraded to High Sierra;

Then got the newer versions of both these. download EtreCheckPro

The "Power User portion" is not essential and is an option to buy; you may get

the EtreCheck utility first and run it; then later 'ignore upgrade' to Power User.

You do not need to get this from App store; direct download from maker-site.

(For supported secure browsers after Firefox ESR, try Brave. Or classic Waterfox.)

~ Also consider an upgrade to High Sierra; your Mac could use it fine.

For older versions of macOS and 'downloadable installers' see:

• How to get old versions of macOS - Apple Support

https://support.apple.com/en-us/HT211683

   1. Remove adware if installed on your Mac..

       Run the latest release of Malwarebytes for Mac to remove malware/adware, if installed on your Mac.

       For instructions: Install Malwarebytes for Mac v4      Uninstall Malwarebytes for Ma

       Click the “FREE DOWNLOAD” button.

       Click the “Scan ” button. Once done, quit Malwarebytes for Mac.

       Restart the computer and relaunch Safari holding the shift key down.

       Scan for Malware again.

       Additional steps  if necessary.

  2. Reset search engine:    https://support.apple.com/guide/safari/customize-your-search-ibrwe75c2a3c/mac

  3. Reset  Homepage.   https://support.apple.com/guide/safari/set-your-homepage-ibrw1020/mac 

  4. Remove unknown extensions:  Safari > Preferences > Extensions

      https://support.apple.com/guide/safari/use-safari-extensions-sfri32508/mac

..dominic23:

This thread had a shadow, or near duplicate of same question.

Same user. https://discussions.apple.com/thread/253530826

Posted hours before this one. ~ I just reported it as duplicate.

Thought you should know.

Take care & good luck! ☺︎

Thanks.