Apple Releases EFI Update for New Late 2013 iMac Models to Address Boot Camp Install Issues - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Releases EFI Update for New Late 2013 iMac Models to Address Boot Camp Install Issues

imac_2013_colorFollowing today's launch of updated iMacs, Apple has released an iMac (late 2013) EFI Update 2.1 for the new machines.

This update is recommended for iMac (late 2013) models. This update addresses an issue which may cause a black screen to appear when installing Windows 7 or Windows 8 using Boot Camp Assistant if both an external optical drive and USB thumb drive are connected to the system. This update also ensures that the system will boot by default into OS X after installation of Windows 8.

The 8.7 MB update requires OS X Mountain Lion v10.8.4 (12E4022) or later, suggesting that at least some new iMacs may need to be updated with the current OS X 10.8.5 upon delivery.

Apple's new iMacs include Intel's latest Haswell processors, improved graphics, faster PCI Express-based flash storage options, and the support for the new 802.11ac Wi-Fi standard making its way into the company's Mac products. The 21.5-inch model begins at $1299, with the 27-inch model starting at $1799.

Related Roundup: iMac
Buyer's Guide: iMac (Don't Buy)
Related Forum: iMac

Popular Stories

Apple iMac M4 hero feature

M6 iMac Coming This Year in New Colors

Sunday August 23, 2026 11:36 am PDT by
Apple is readying new iMac models with an upgraded chip and new color options, according to Bloomberg's Mark Gurman. Writing in his latest Power On newsletter, Gurman says the new version is likely to be an updated 24-inch model with an M6 chip, replacing the existing M4 model that arrived in October 2024. New colors are also said to be on the menu, though Gurman does not say what they...
iscreenbar 1

BenQ's New iScreenBar is a Monitor Light Bar Made for the iMac

Tuesday August 25, 2026 5:31 pm PDT by
BenQ today announced the launch of the iScreenBar, which it says is the first monitor light bar built for the iMac. The iScreenBar is meant to look like an extension of the iMac, offering desk lighting that does not clash with the iMac's design or block the camera or microphone. It's made from aluminum and lights an area of 33.5 by 19.7 inches at 500 lux. A glass touch panel is available for ...
iMac Blue Isolated

Apple's Last Intel 21.5-Inch iMac is Now Vintage

Tuesday September 15, 2026 12:53 pm PDT by
Apple today added the 2019 4K iMac to its list of vintage products, which means repairs can only be done if Apple has the parts available. Products are added to the vintage list five years after they were last distributed for sale, and they're moved to the obsolete list at the seven-year mark. Vintage products can be repaired at Apple Stores and by Apple Authorized Service Providers if the...

Top Rated Comments

169 months ago
Honestly people and no excuse to whine about this.

They found a problem, issued a fix in a timely manner, and notified the public. Sounds like good business practice to me.

Grow up.
Score: 5 Votes (Like | Disagree)
jafingi Avatar
169 months ago
Apple hasn't even shipped these and there's an EFI update. Why doesn't Apple just install the update before they ship them ?

Why ?

Because they have been sitting in a warehouse for a while now.

Probably the same for the MB Pro's and Air's.

And the Mac Pro.

Because they have to mass produce these machines before making them available. It's not like they begun making them one week ago. Maybe started 1-2 months ago, and in the meantime, they have been testing them and found the issues hence addressing them in an update now :-)
Score: 5 Votes (Like | Disagree)
169 months ago
Apple hasn't even shipped these and there's an EFI update. Why doesn't Apple just install the update before they ship them ?

Why ?

Because they have been sitting in a warehouse for a while now.

Probably the same for the MB Pro's and Air's.

And the Mac Pro.
Because its called having to build up stock.... and if they didnt people like you would bitch about not being enough available... like they magically appear on store shelves. Please... Find something else to complain about. As you so obviously put it... their not even out yet so I doubt your "Inconvenienced" by hitting the update button..

----------

This wouldn't have happened if S.... Nevermind:D

Too damn funny. But i agree. lol
Score: 2 Votes (Like | Disagree)
Battlefield Fan Avatar
169 months ago
This wouldn't have happened if S.... Nevermind:D
Score: 2 Votes (Like | Disagree)