I need to downgrade my OS

Just, I upgraded my OS and I have some problem of compatibility with my Numark MixDeck Express controller running Serato.  I am not getting any audio sound card of the computer that works with other applications.

I need to downgrade to Yosemite to make it work again. How can I do this?

If you previously had Yosemite and you have a backup, then use the command + Option + R for recovery of the internet; When it is connected to the Apple servers, use disk utility to erase your hard drive and then choose to restore from a backup that was Yosemite. Or choose to install the original OS and then go to Yosemite (which will be available only if you have downloaded previously).

Tags: Mac OS & System Software

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