Which iCloud service runs in background in OS X? I wondered which service is acutally updating the MobileDocuments folder in OS X? 

I looked through the Apple Developer pages, but nowhere is any information about background services in OS X.


  When i save a file with TextEdit in the iCloud,the file is created in
  the MobileDocuments folder. But how does it trigger the background
  service?


Is there any information about those things yet?
No it doesn't trigger to run any process.

Because the process is always running. The process for doing these kind of things is ubd.

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