See attached screen shots for machine config.
When I recently tried to upgrade to HS, I got a dialog that looks like the first screen shot.
My question is this: Once I do the indicated firmware update, will I still be able to boot from older MacOs's such as Lion or El Capitan?
Cheers,
D.Dave
Update: I'm a newbie at this forum stuff. I see that there is much discussion of this topic already. But, please answer if there is something new to add. Thanks.
When I recently tried to upgrade to HS, I got a dialog that looks like the first screen shot.
My question is this: Once I do the indicated firmware update, will I still be able to boot from older MacOs's such as Lion or El Capitan?
Cheers,
D.Dave
Update: I'm a newbie at this forum stuff. I see that there is much discussion of this topic already. But, please answer if there is something new to add. Thanks.
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