Q: Safari doesn't work despite all suggested fixes...

Hi...

Sorry you're having so may issues with Safari. The thing, is you don't tell us exactly what you have tried that didn't work, we have no way knowing so all we can do is troubleshoot.

When Safari won't load webpages, reinstalling Safari is rarely the fix.

You may have a Safari extension or third party plug-in installed that's causing a conflict. It's easy to troubleshoot.

From the Safari menu bar click Safari > Preferences then select the Extensions tab. If there are any extensions installed, uninstall one at a time then quit and relaunch Safari to test.

If it's not an extensions issue, try troubleshooting third party plug-ins.

Back to Safari > Preferences. This time select the Security tab. Deselect:  Allow plug-ins. Quit and relaunch Safari to test.

If that made a difference, instructions for troubleshooting plugins here.

If it's not a plug-in or extension issue, if you have anti virus software installed, that can prevent webpages from loading. So can net monitoring apps such as Little Snitch and Growl.

Always good to have a backup browser installed in case Safari is having problems.

Either Firefox or Chrome will work on El Capitan.

How are you connecting to this website?

Is the problem just Safari? Are you able to use a different browser? Can you send and receive email? It would be nice to know if we are dealing just with some issue involving Safari or if you can’t even get online. And what do you mean by download time is savage?

Please read this whole message before doing anything.

This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.

Step 1

The purpose of this step is to determine whether the problem is localized to your user account.

Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”

While logged in as Guest, you won’t have access to any of your documents or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this behavior; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.

Test while logged in as Guest. Same problem?

After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.

*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.

Step 2

The purpose of this step is to determine whether the problem is caused by third-party system modifications that load 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.

Please take this step regardless of the results of Step 1.

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 log in 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 Steps 1 and 2.

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.

If that's your conclusion, you would have to refer to the router's documentation or to your ISP for support. The support page linked below might help you.

Recommended settings for Wi-Fi routers and access points - Apple Support