New Firmware For MacBooks and iMac: What It Does Is Universal Mystery
Apple has released new firmware updates for several machines, but offered no meaningful explanation of what the update does. Apple’s note is maddeningly cryptic:
This update fixes several issues to improve the stability of [MacBook Air. Macbook, MacBook Pro, iMac] computers
The updates have sparked consternation in the Mac web world. At sites like the MacRumors forums, more than 200 commentators are asking, “What does it do?”
The updates are for:
Apple also released an update for the Aluminum Keyboard, but this one at least includes a meaningful description of the changes:
This firmware update addresses an issue with the aluminum Apple Keyboard and the aluminum Apple Wireless Keyboard where a key may repeat unexpectedly while typing.
Leander Kahney is the editor and publisher of Cult of Mac, and author of three books about technology culture: 
