On Mac OSX Yosemite why does my computer download 500MB every day whether I am using it or not? 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?
nsurlsessiond deals with iCloud &amp; also Spotlight.


for Spotlight - Prefs > Spotlight > Search Results &amp; switch off Spotlight Suggestions &amp; Bing Web Searches.
iCloud, some suggestions…


Disable iCloud Photo Library, Photo Stream &amp; 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