I have Mac OSX Yosemite, 10.10.1 and halfway through last month my computer decided to download about 500MB every day. I even quit all programs and it still downloaded 447MB. I am seeing this number in the network section of Activity Monitor and the Process name listed is nsurlsessiond. What is this downloading and how do I stop it?

  • google just the term nsurlsessiond and it seems to deal with the photo's app. There is so much info tho I quit reading, you're not the only one by far that's complaining.....
    – Tyson
    Apr 25, 2015 at 4:16
  • 1
    If you run "lsof -i -n -P | grep TCP" in terminal it will show you who.
    – Ruskes
    Apr 25, 2015 at 4:25
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    @Tyson It can't be the Photos app, because this is 10.10.1 and Photos was introduced in 10.10.3.
    – Mike Scott
    Apr 25, 2015 at 5:21
  • lsof doesn't return anything useful now so the nsurlsession must not be running. I'll check again later.
    – Daniel
    Apr 25, 2015 at 5:28
  • nsurlsessiond downloads data on behalf of other apps in the background. This includes iCloud Drive, Photos (10.10.3 & later), Photo Stream, and presumably third-party apps that implement it. You could monitor what domains it's communicating with by using something like Little Snitch so you can narrow down what program it is.
    – tubedogg
    Apr 25, 2015 at 10:12

2 Answers 2


nsurlsessiond deals with iCloud & also Spotlight.

  • for Spotlight - Prefs > Spotlight > Search Results & switch off Spotlight Suggestions & Bing Web Searches.

  • iCloud, some suggestions…

    • Disable iCloud Photo Library, Photo Stream & iCloud Photo Sharing from
      System prefs > iCloud - Photos [or equivalent, I can't remember the precise layout before Photos app]

    • If you have an iPhone, the same settings are in Settings > iCloud > Photos


nsurlsessionhd can be disabled with

sudo launchctl unload /System/Library/LaunchDaemons/com.apple.nsurlsessiond.plist

BUT you run the risk of some Apple (and maybe non-Apple) apps not being able to connect to the internet, specifically App Store, iTunes, software updater, etc. If that is the case re-enable by replacing unload with load in the command above.

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