[X4U] Mavericks and firmware

[Randy B. Singer]

On Mar 2, 2014, at 4:55 PM, catsoul wrote:

> does installing mavericks make any firmware changes to a mac such that it can't go back to mountain lion?

No, but there is no downgrade path either.  If you want to downgrade you have to backup, erase your hard drive, install Mt. Lion, and then restore all of your apps and documents sans Mavericks.

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Randy B. Singer
Co-author of The Macintosh Bible (4th, 5th, and 6th editions)

Macintosh OS X Routine Maintenance
http://www.macattorney.com/ts.html
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