I have figured a process called 'Safari networking' (I think it's the process of safari browser) consumes lots of bandwidth. It's about 1 GB in 1 hour, but I didn't download anything. I have also found that it eats bandwidth only when gmail is opened in a safari tab. If you close gmail tab, bandwidth usage is normal.Any idea why this is happening ?

OSX Yosmite 10.10.2
Safari 8.0.3

  • 1
    1GB seems very high, but some usage would be normal as Gmail communicates with the server on a regular basis even if it's unattended. – tubedogg Feb 27 '15 at 5:03

I have a similar problem. Last month, on one particular day, 80GB was downloaded (and another day, almost 40GB). This was definitely not something I was downloading - I don't even have 40GB of spare disk on any computer at home!

enter image description here After resetting router passwords (in case someone was hacking my wifi), and monitoring all my home computers, I also narrowed it down to gmail, but only on my wife's and daughters accounts. One particular email from Pintrest caused 1GB to download in a few minutes before I switched tabs and it stopped. I reopened the email, but it didn't happen a second time. Also forwarded the email to my account but the problem didn't reoccur, so I'm not sure it was related to that particular email.

It's happened about 3 times in the last month, every time in Safari (I think, but I'm not 100% sure).

Has anyone else seen this, or does anyone have any ideas as to its cause?

(All my home computers are Macs, with the latest updates applied.)

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