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My MacBook Pro 2011 with latest High Sierra 10.13.02 is suffering from a hard disk usage from time to time. In attempt to track down where all these disk I/O 's are coming from I came across to a "fud" process being called:

/System/Library/PrivateFrameworks/MobileAccessoryUpdater.framework/Support/fud

What has to do with Mac OS X and can I disable it ?

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It seems that fud is the firmware update daemon of com.apple.MobileAccessoryUpdater that presumably is responsible for firmware downloads for bluetooth peripherals and running the firmware update daemon (hint for fud found here)

To unload/disable it run in a terminal (this will persist through restarts, but probably not OS updates):

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.MobileAccessoryUpdater.plist

To enable/load it again run in a terminal:

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.MobileAccessoryUpdater.plist

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