All browsers in my mbp can't open http website but https website

If your Mac is running 10.11.3, updating your OS X software to 10.11.4 may help.

Click your Apple  top left in your screen. From the drop down menu click App Store. When the App Store opens select Updates from the menu.

Your Mac may restart several times during the update process. When it's done try Safari.

I have the exact same problem, and upgraded my mac but nothing happened. I don't have that proxy software though

please I want a solution ASAP

Safari - Unsupported third-party add-ons may cause Safari to unexpectedly quit or have performance issues

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

Safari/other browsers – Website not loading

well I didn't particularly solve it, and I use firefox so those links didn't work that well

so what I did was :

1. upgraded my mac from el capitan 10.11.3 to 10.11.4

2. used a VPN >>http://www.vpngate.net/en/ and it worked!

since the VPN is kinda always on, I have no problem accessing HTTP or HTTPS websites alike

I like the VPN idea too

of course I'm still interested in how and why I can't access http without a VPN. but at least it now works

and BTW xingheng, i took this idea from your reply so thanks 🙂

HTTP uses TCP port 80 and HTTPS uses TCP port 443.

Test the issue in safe mode: Try safe mode if your Mac doesn't finish starting up - Apple Support

If the issue is not present in safe mode, boot to normal mode.

If the issue is resolved, it was isolated to caches or errors on the disk that safe mode repaired/cleaned.

If the issue comes back it's related to third party software. Check login items and the following folders:

/Library/StartupItems

/Library/LaunchAgents

/Library/LaunchDaemons

/Library/Extensions

~/Library/LaunchAgents

~/Library/LaunchDaemons (may not exist)

Further isolation steps you can do to determine if the issue is related to the network or the computer is test in recovery mode. Select Get Help Online from the OS X Utilities menu to open Safari. Granted, for this situation it would most likely not be needed.

so I've tried safe mood and the problem didn't exist. what I understand is that I need to check those files

but check for what exactly?

Gin. wrote:

so I've tried safe mood and the problem didn't exist. what I understand is that I need to check those files

but check for what exactly?

Did the issue occur after rebooting into normal mode? If the answer is no then no further troubleshooting is needed.

What you see in these folders are called plists or property lists. These specific plists are to launch processes at either system start or user login. The exception would be the /Library/Extensions folder which is for kernel extensions, save this folder for last. Start at the first folder and move all items to the desktop then restart. If the issue is not present, it's related to one of these files, add them back one by one then restart until the issue occurs--you've then narrowed it down to the specific third-party software that is causing the issue. If the issue is present then add them all back and repeat with the next folder. It's most likely related to some type of security or network software. Since you have VPN software, you can try removing the plists related for the VPN software first before doing the above steps. Remember, a restart is required for the changes to take effect.

For future reference: this item is related to the "VSearch" ad-injection malware. See the instructions by Linc Davis in this topic: Re: Remove adware (offerz4u/eshopcom) from safari

your solution worked for me too 🙂 thanks