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user macbook unrecognised

  1. A

    unrecognised users on apple macbook

    I have just tried to change the read/write permissions on a file on an Apple Macbook to add a user, and found three user names that I do not recognise: _avipm _avqmd _avuxupdate They do not appear under Users and Groups in System Preferences. What are they and are they a problem? if a problem...
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