No possibility to roll back?

To the frequent insistence of Apple, I installed El Capitan.  We will leave aside the quality of the software, but foolishly, I kept it El Cap for a few weeks.  Finally, I went to the Apple store, the genius bar.  Long story short, I can't access a prior backup car - ta - da - he didn't is not readable by El Cap I was shocked that Apple would essentially be six deep the concept of backup, but that's what engineering insisted on the truth.  Really, is this the truth?  Once you install El Cap, you can't go back?

Is what kind of backup? Time machine or a clone?

Basically, you cannot boot from a version earlier than what is installed - you will need to wipe the hard drive first. This means that you need to be started from another source, wipe your drive and reinstall the old version (whether via the Internet or from a backup recovery).

Tags: Mac OS & System Software

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