Macbook Pro won't open most websites on any browser

Lacking more to go on perhaps something here applies:

Helpful Links Regarding Malware Problems

If you are having an immediate problem with ads popping up see The Safe Mac » Adware Removal Guide, remove adware that displays pop-up ads and graphics on your Mac, and AdwareMedic. If you require anti-virus protection Thomas Reed recommends using ClamXAV. (Thank you to Thomas Reed for this recommendation.) You might consider adding this Safari extensions: Adblock Plus 1.8.9.

Open Safari, select Preferences from the Safari menu. Click on Extensions icon in the toolbar. Disable all Extensions. If this stops your problem, then re-enable them one by one until the problem returns. Now remove that extension as it is causing the problem.

The following comes from user stevejobsfan0123. I have made minor changes to adapt to this presentation.

Fix Some Browser Pop-ups That Take Over Safari.

Common pop-ups include a message saying the government has seized your computer and you must pay to have it released (often called "Moneypak"), or a phony message saying that your computer has been infected, and you need to call a tech support number (sometimes claiming to be Apple) to get it resolved. First, understand that these pop-ups are not caused by a virus and your computer has not been affected. This "hijack" is limited to your web browser. Also understand that these messages are scams, so do not pay any money, call the listed number, or provide any personal information. This article will outline the solution to dismiss the pop-up.

Quit Safari

Usually, these pop-ups will not go away by either clicking "OK" or "Cancel." Furthermore, several menus in the menu bar may become disabled and show in gray, including the option to quit Safari. You will likely have to force quit Safari. To do this, press Command + option + esc, select Safari, and press Force Quit.

Relaunch Safari

If you relaunch Safari, the page will reopen. To prevent this from happening, hold down the 'Shift' key while opening Safari. This will prevent windows from the last time Safari was running from reopening.

This will not work in all cases. The shift key must be held at the right time, and in some cases, even if done correctly, the window reappears. In these circumstances, after force quitting Safari, turn off Wi-Fi or disconnect Ethernet, depending on how you connect to the Internet. Then relaunch Safari normally. It will try to reload the malicious webpage, but without a connection, it won't be able to. Navigate away from that page by entering a different URL, i.e. www.apple.com, and trying to load it. Now you can reconnect to the Internet, and the page you entered will appear rather than the malicious one.

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.

Found a solution! I applied the combo update as suggested in a post from this thread:

After 10.10.4 update I cannot load pages in Safari, connect to the AppStore and AirDrop. How it can be fixed?

The combo update can be found here:

OS X Yosemite 10.10.4 Combo Update

Now I am back on the web and surfing like I was on 10.10.3!

Hello Linc Davis,

I have a very similar issue to the one described above. None of my browsers will load pages after few minutes of browsing. I start my computer and open Safari, as it is my primary browser. I load maybe 3 or 4 different websites over the course of say 2 minutes and then it hangs, eventually giving me the message the server isn't responding. I then opened Chrome and immediately get the same error message. If I restart the computer the cycle starts all over again. Even if I try to launch Chrome first I get the same result. I have not found anything to solve or even temporarily fix the issue once it occurs without restarting. I am trying to recall the things I have done so far but here is the list I can recall:

-I have tried to switch to a different Wi-Fi network.

-I have created a new network location.

-I have Renewed DHCP Lease.

-I have added DNS Servers: 208.67.222.222, 208.67.220.220, then added 8.8.8.8, 8.8.4.4

-I have deleted multiple plist and com.apple.<insert any logical file name here> files.

-I reset DNS cache and deleted cache.db

-I have run several terminal commends to the mDNSResponder...

-I have tried logging in with a different user account

-I have multiple devices on the same network and all the others work fine so I know it is not and ISP issue

Important to note:

-I can successfully ping websites.

-I know I have a solid connection because I can stream music via spotify, I can access my mail through Apple Mail, I can access the iTunes store, etc.

-I was able to browse without issue while booted into the recovery partition.

-I did recently apply the 10.10.4 update and I believe that included a Safari update. As of right now this is the leading culprit.

Currently I am running a virus scan which was mentioned in an earlier reply to this post. "ClamXav"

Any additional help or instruction would be greatly appreciated.

Thanks in advance,

carguy333

I'm the Mac Admin for a corporate entity. I have two users that are experiencing this same issue since upgrading to 10.10.4. On the corporate network, when loading pages in Chrome or Safari, it will work for an hour at best and then the same pages render a background and header and keep spinning with no connection. Thought it was internal sites only but once it occurs, it effects external sites as well. I've uninstalled java and flash player, no extensions or plug-ins are active and the only way I've been able to fix it (temporarily) is to uninstall Chrome, clear all site history and data in Safari, reboot and try again. Safari works a bit longer without Chrome installed, but eventually fails. I've run Malwarebytes for Mac as well as virus scanning and nothing. No infections.

I've looked into downgrading back to 10.10.3 but it appears convoluted in that if I go back via time machine, I lose any newly created or updated files for the user going back to 10.10.3. All other users on 10.10.3 are working without issue...so I can rule out network issues.

I've downloaded the combo update but leery to attempt it since CarGuy333 said it eventually failed again. Other posts have said disabling IPv6 helps similar issues and also that the change to the network discovery feature in Yosemite is the culprit. Apple has not been of any help for this issue and I'm at my wits end. Unless someone knows how to downgrade back to 10.10.3 without losing data, I am afraid I may have to redo the clients machine completely. And for that, I have no spare machines to do this with.

Please advise...anyone.

If Safari is slow, stops responding, quits unexpectedly, or has other issues

If Safari doesn't load a page or webpage items are missing

Following the instructions for Resetting the DNS cache in OS X

Then restart your Mac and try a browser.

You might try resetting the DNS cache: Non-responsive DNS server or invalid DNS configuration can cause long delay before webpages load and OS X- How to reset the DNS cache.

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

Something is wrong with your network, not with your computer. Reset your router to its factory state and reconfigure it. If that doesn't work, contact your ISP.