macOS Mount /dev/disk*s*

[DeDMakar]

HI.
Obj-C, Cocoa.
How to mount USB drive from folder /dev/ by means of API? FSMountServerVolumeSync, FSMountLocalVolumeSync, other method. Utilits are not used. Please example.

 

[DeDMakar]

Then another question. Why USB drive is not mounted when the screensaver is on?