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Here is a tutorial on how to root your phone. Click here: https://androidmtk.com/how-to-root-samsung-galaxy-mega-6-3-sgh-m819n
Please take a minute and use to the rating system to rate our session as 3 stars or higher so I am credited with helping you.
Please pardon my silence. I v just returned from another town. Your link uses Windows but mine is Mac OS 10.10.5 (Yosemite).
Reminding after 12 hrs: Do you have a workable link?
Reminding after 18 hrs: Do you?
Request after 24 hrs: Please kindly repost my question to other experts.
I am very sorry -- I have been out of the office for the past couple of days.
You can use OneClickRoot which works on PC and Mac. Click here: https://www.oneclickroot.com/root/samsung-sgh-m819n-ktu84p-m819nuvubni5-4-4-4
Select Menu then Download
I looked over some reviews of that website and the above is just one of the negative which evaluate it as a scam.
Unless you find something else, please kindly repost my question to other experts. Thank you much for trying.
I didn't find my Q. Did U repost it?