Random web pages opening

Greetings slkice4444,

Let's first see if we can identify which app this is stemming from.

Please quit all open apps on your Mac, put your Mac to sleep for a minute or two, wake it up and before closing the website that appears when you wake your Mac, check the Dock to see if any of your app icons have a dot below them. That’s going to tell us which app is open. You could also tell by pressing the Command + Option + Esc keys which will open the Force Quit Window and show which apps are running. 

Another step we can take is to check to see if the issue persists in safe mode. How to use safe mode on your Mac Your profile shows we’re working with a Mac mini running macOS High Sierra. To get to safe mode - 

1. Turn on or restart your Mac, then immediately press and hold the Shift key as your Mac starts up.

2. Release the key when you see the login window, then log in to your Mac. 

3. You might be asked to log in again. On either the first or second login window, you should see ”Safe Boot” in the upper-right corner of the window.

At that point, put your Mac to sleep for a minute or two, wake it up and see if that website appears. 

Thanks.

Hi slkice4444.

Thanks for trying those steps.

Next, let's follow the steps below to see if we need to remove Safari as a login item:"On your Mac, choose Apple menu  > System Preferences, then click Users & Groups .Select your user account, then click Login Items at the top of the window.Do any of the following:

4.Remove a login item: Select the name of the item you want to prevent from opening automatically, then click the Remove button below the list."

Hope this helps.

Cheers.

Hi slkice4444,

We appreciate you working through those steps. At this point, we would like to have you reach out to Apple Support directly here: Contact Apple Support

Thanks