Target Disk Mode - MacBook is not mounted in the desktop iMac

I have a MacBook to 2015 and a cable USB-A-USB-C marked 'SS '.  In November 2015, I might start my MacBook in TDM and plug it into my iMac 2013 and see him mount on the desktop.  I could then synchronize some of the files (using synchronize folders) and have up-to-date on my MacBook.  Both computers running El Capitan.

But about 3 months ago this system has stopped working.  Editing of my MacBook on the desktop iMac became sporadic and now never happens.  I have tried different cables, connected to different USB ports (the back of the iMac, iMac keyboard and a Flash to USB dock (Belkin)), but no joy.

Has updated the firmware of computers?  El Capitan has stopped this feature very useful to work?

Any ideas, anyone?

Chris

As a work-around, there are other ways of synchronization of files between devices.

iCloud Drive, Box, OneDrive, DropBox, Google Drive. These will make everything you do.

Tags: Notebooks

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