There is a new version of a Browser Hijacker virus/malware/trojan going around now and this is only ONE of the symptoms of what it does to your system. I should also note that a full scan of the system currently by MalwareBytes AND McAfee AV does NOT completely remove this hijacker from your system, mainly because MalwareBytes simply does not know how to find ALL the instances and modifications this Hijacker is making on your system, and McAfee has always been a bit more concerned with actual viruses and things that do permanent damage to your files on your system. 

If you notice a strange new Extension in your list of them, and it's the one that cannot be disabled then this is a sign that this Hijacker has in fact gotten on to your system. In my case it was from being foolish and running an executable file I thought was safe, even though it was from a suspicious source, because scanning the executable itself with McAfee did not find any issues with the file. It has taken me almost a week to finally get rid of this Hijacker but I now can say that I am back to normal operation. For me it was a lengthy manual process of finding registry entries and deleting them, deleting extension files manually from Chrome directories, and then finally realizing the last thing the Hijacker had done was changed my DNS server from my normal one to some weird place in Indonesia. 

Currently from discussion with other technical support users the easiest way to get rid of this program is to do a system restore from a date before it infected the system, if this is known, and is best done in Safe Mode, and with antivirus software temporarily disabled. 

IF the date the issue started occurring is not well known. Or there isn't any way or someone dosent feel comfortable in how to get into Safe Mode and temporarily disable their Antivirus programs then hopefully soon a more simplified and comprehensive solution will be forthcoming from MalwareBytes or some of the other major Antivirus manufacturers. 

I wish you luck and hope you are able to get the problem resolved. 

Eric Dawson

[20+ years of hardware and operating system tech support experience.]

To fix this on a mac, I deleted all google & chrome files in my libraries to start fresh. The really suspicious file was ~/Library/Preferences/com.google.Chrome.plist that had somehow been set (and continued to be re-set) to open new tabs to searchmine.

After deleting everything, emptying trash, rebooting, then opened chrome - no more incorrect "managed by your organization".

I've googled many times and manually removed files - didn't remove the "searchmine" default search engine and "managed by organization". Then I was able to set my default search engine to google.com, but it just looked like I changing the setting. I downloaded the free version malware software recommended by Apple - didn't work completely. 

This video made it easy...just to clarify some steps in the video for those that aren't computer saavy, 

1. the Terminal.app (black pop up box) can be found in your Finder > Applications folder. 

2. You must close Chrome before typing in the Terminal, so I took screenshots of my policies and of his text so I knew what to type in the Terminal, but you can just open his video in Safari or a different browser.

3. No restart was needed. Just re-open Chrome. 

woot woot!

Thank you all!