Pornographic Popups and Virus Warning!!!!

Force quit Safari (Apple Menu->Force quit...).

Next how down the Shift key when opening Safari. This will force it

to start by opening to your home page.

As stated in a previous post Clear History...

You should be back to normal.

It may also be necessary to disconnect from any connected network

if it is still an issue and then perform the above.

What you have encountered is likely a persistant javascript

(not Java which is different) on a page that was visited that continually

loads pop-ups and continually "phones home" to refresh the page

thereby making Safari unresponsive.

You should still make sure you did not inadvertently download and install

adware/malware by installing and running Malwarebytes.

First try to clear it from the browser. If Safari, in the Safari dropdown menu Clear History. In Safari Preferences / Privacy / Manage Website Data / click on Remove All. In Safari Preferences / Advanced check the box at bottom for Show Develop menu in menu bar. Then go to Develop and click on Clear caches. Also click on Security and enable Block pop-up windows.

If this does not solve it, you may have to reinstall the OS from Recovery mode. Boot up while holding down the Command and R keys and choose Reinstall OS.

I suggest you use the program created by Etresoft, a frequent contributor. It will provide a snapshot of your system which we can analyze to possibly determine the cause of your problem. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

I suppose you have a virus. Probably adware. Those pop-ups might be caused by this program and the only solution here is anti-malware tools. You should download it, scan your system and perform a malware removal as the tool suggests. It is not difficult. There are a few free programs you can get online.