Question about HDD replacement

so, ive got rookie question.

im going change stock 750gb spinner drive ssd. plan on using ccc clone prior opening system , swapping drives. now, ive got 2012 mbp (currently running sierra, not going hs yet)... got hdd caddy owc replace optical drive hdd , putting 750gb drive in there. after doing this, when fire computer, know boot ssd, or boot spinner? since both identical. or ask me drive boot from? id not wipe , format spinner until after booted on ssd.

 

pkupman57 said: ↑

so, ive got rookie question.

im going change stock 750gb spinner drive ssd. plan on using ccc clone prior opening system , swapping drives. now, ive got 2012 mbp (currently running sierra, not going hs yet)... got hdd caddy owc replace optical drive hdd , putting 750gb drive in there. after doing this, when fire computer, know boot ssd, or boot spinner? since both identical. or ask me drive boot from? id not wipe , format spinner until after booted on ssd.

thanks

click expand...

you tell under system preferences disk boot from. suggest, try booting ssd in caddy before installing in computer.

 

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