Macbook Pro can't browse internet with OS El Capitan

Please read this whole message before doing anything.

This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.

The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.

Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem.

Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.

Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.

The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.

Test while in safe mode. Same problem?

After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

Have you run network diagnostics. https://support.apple.com/kb/PH21677?viewlocale=en_US&locale=en_US

Please start up in Recovery mode. In the OS X Utilities screen, select Get Help Online. A clean copy of Safari will launch. No plugins, such as Flash, will be available. While in Recovery, you'll have no access to your saved bookmarks or passwords, so make a note of those before you begin, if they're needed for the test.

Test. After testing, restart as usual and post the results.

Restart your router and also your broadband device, if they're separate.

Please test on another network, such as a public hotspot, or the personal hotspot created by a mobile phone.

Are you running anti-virus? If so, uninstall it, you don't need it and try again.

Safari is not the problem. You have some other conflict most likely from a 3rd party application.

It is possible that Safari has become corrupted. Had this happen to me. But I run Snow Leopard, so I was able to go to support/downloads and get safari and reinstall. You would have to reinstall through recovery. This would not delete your personal files.Some third party add on corrupted it. I don't remember what is was now.