APFSD(8) System Manager's Manual APFSD(8)

apfsdAPFS volume manager

apfsd is the APFS volume management daemon, it controls volume encryption and decryption, automatic file defragmentation and performs other housekeeping duties as necessary.

apfsd is invoked invoked by launchd(8) when presence of APFS volume is detected.

/System/Library/LaunchDaemons/com.apple.apfsd.plist

diskutil(8)

August 8, 2017 OS X