Apple Releases iMac EFI Update 2.0 to Fix Sleep and Thunderbolt Issues

MacRumors · Dec 17, 2012, 05:18 PM

Apple has released an update for late 2012 iMac models that fixes issues related to sleep and Thunderbolt, as well as compatibility when using 5GHz Wi-Fi frequencies. The update is recommended for all "late 2012" iMacs.

iMac EFI Update 2.0 can be downloaded from Apple's support site or through the Mac App Store on affected iMacs.

Quote:

About iMac EFI Update 2.0

This update is recommended for all iMac (late 2012) models. This update contains general performance fixes pertaining to sleep and Thunderbolt, and improves compatibility when using the 5GHz band in Wi-Fi.

Boot ROM or SMC Version Information: After Update is complete:

Build version: 010A.05
ROM version: IM131.88Z.010A.B05.1211151146

It's not clear if this is in addition to the Wi-Fi Update released earlier today, or if it includes that fix as well as a few more iMac-specific ones.

Update: Apple has released a similar MacBook Pro Retina EFI Update v1.1 for the 13-inch Retina MacBook Pro.

Article Link: Apple Releases iMac EFI Update 2.0 to Fix Sleep and Thunderbolt Issues

Locoboof · Dec 17, 2012, 05:20 PM

Great!

jayhawk11 · Dec 17, 2012, 05:23 PM

Both updates (the WiFi update *and* the EFI update) came through on my brand new 21" iMac. Must be distinct.

Chupa Chupa · Dec 17, 2012, 05:28 PM

I wonder if this fixes the unmount on sleep w/ USB 3 hard drives. Otherwise what other sleep issues is the new iMac having? (Not home to try right now). Curious b/c the USB 3 issue was the only one I experienced. I wish Apple was more detailed in their update synopsis.

charlieegan3 · Dec 17, 2012, 05:31 PM

The picture for this story is skewed in the sidebar.

Yes I know it's a small thing...

Lancer · Dec 17, 2012, 05:41 PM

Good to see they are on top of things, just wondering how many updates will be waiting for new iMac users when we get them?

TouchMint.com · Dec 17, 2012, 06:02 PM

By the time I get mine I feel like they will have everything fixed lol

mikeheenan · Dec 17, 2012, 06:14 PM

When are they going to release a fix for the intermittent freezing on the rMBP's?

portishead · Dec 17, 2012, 06:14 PM

Quote:

Originally Posted by charlieegan3

The picture for this story is skewed in the sidebar.

Yes I know it's a small thing...

you should pm the moderators instead of posting in the forums.

jdegid · Dec 17, 2012, 07:16 PM

Good to know there is a fix
And I agree the iMacs are Late

Catsman · Dec 17, 2012, 07:21 PM

Still problems of this nature for rMBP Mid 2012. Are they working backwards?

BSoares · Dec 17, 2012, 07:24 PM

Both updates said not for my system. I have a 27" 2012 iMac that just arrived today.

MrMister111 · Dec 18, 2012, 04:53 AM

Will this help my 21.5" late 2012 iMac? I have issues waking from sleep whereby it wakes to a white screen only.

charlieegan3 · Dec 18, 2012, 05:07 AM

Quote:

Originally Posted by portishead

you should pm the moderators instead of posting in the forums.

Ok, maybe I will.

chineseguy38 · Dec 18, 2012, 06:39 AM

It makes no difference on my machine.

Jbach67 · Dec 18, 2012, 12:53 PM

and mine (5 day old iMac) says this software is not supported on my system for both upgrades. Weird.

kdavis · Dec 18, 2012, 03:54 PM

I posted this in another thread last night - I spent some time on the phone last night with Apple support after both of yesterday's updates failed on my 27", 2012 iMac. They were surprised at the updates not working for me and confirming that, yes, as best they could tell the updates should work on both the 21" and 27" iMacs. They downloaded info from my machine to forward on to engineering and we're scheduled to talk again on Wednesday to see what they've found out about this problem. I told them that there were others besides me experiencing this issue.

Any rhyme or reason we can figure out here? Anyone with a 27 incher that had either or both of today's updates work? I'm seeing posts where the updates worked on 21" machines, and failures on 27" machines.

UPDATE: looks like they've changed the download page here: http://support.apple.com/kb/DL1618
to specify that the EFI update is for the 21.5" iMac only.

The WiFi update still says it is for all late 2012 Macs, but does not run on my 27"

bielen · Dec 18, 2012, 04:54 PM

These updates are definitely not necessary for the 27" 2012 iMac. Neither can even be installed.

CaptMike · Dec 27, 2012, 11:52 PM

Quote:

Originally Posted by TouchMint.com

By the time I get mine I feel like they will have everything fixed lol

Exactly.....hope that apple is holding on to all the orders to the resellers until things have been resolved.

Still waiting for the 21.5" fully loaded since Dec 15

Paul-B · Jan 4, 2013, 04:38 PM

Quote:

Originally Posted by BSoares

Both updates said not for my system. I have a 27" 2012 iMac that just arrived today.

My 27" is a week-old and I have shut off sleep mode as it has a problem waking and requires my password and all open programs are quit. I guess our up will follow...

Lil Chillbil · Jan 5, 2013, 12:11 AM

is it me or is apple screwing up a lot lately

Dec 17, 2012, 05:23 PM	#3
jayhawk11 macrumors 6502a Join Date: Oct 2007	Both updates (the WiFi update and the EFI update) came through on my brand new 21" iMac. Must be distinct. __________________ 15" MacBook Pro Unibody, 2.2 GHz Quad Core i7; 32 GB iPhone 5; 32GB iPad Mini Rock Chalk Jayhawk, Go KU.
	0

Dec 17, 2012, 05:28 PM	#4
Chupa Chupa macrumors 604 Join Date: Jul 2002	I wonder if this fixes the unmount on sleep w/ USB 3 hard drives. Otherwise what other sleep issues is the new iMac having? (Not home to try right now). Curious b/c the USB 3 issue was the only one I experienced. I wish Apple was more detailed in their update synopsis. __________________ Walled Garden ≠ Prison: "People who use Apple products considered their options, and chose Apple. If they regret their decision, they can dump it at any time." -- Harry McCracken, Technologizer.com
	0

Dec 17, 2012, 05:31 PM	#5
charlieegan3 macrumors 68020 Join Date: Feb 2012 Location: U.K	The picture for this story is skewed in the sidebar. Yes I know it's a small thing... __________________ www.charlieegan3.com
	4

Dec 17, 2012, 06:02 PM	#7
TouchMint.com macrumors 6502 Join Date: May 2012 Location: Phoenix	By the time I get mine I feel like they will have everything fixed lol __________________ www.TouchMint.com iPhone App Developer Apps of the month: Baseball Stats Tracker Touch (Over 10,000 Copies Sold!) Quiz and Flashcard Maker
	0

Dec 18, 2012, 04:54 PM	#18
bielen macrumors member Join Date: May 2008 Location: New Jersey	Not for 27" iMac These updates are definitely not necessary for the 27" 2012 iMac. Neither can even be installed.
	0

Dec 17, 2012, 05:20 PM	#2
Locoboof macrumors regular Join Date: Jun 2008 Location: Bay Area,Cali	Great!
	0

Dec 17, 2012, 05:41 PM	#6
Lancer macrumors 65816 Join Date: Jul 2002 Location: Australia	Good to see they are on top of things, just wondering how many updates will be waiting for new iMac users when we get them?
	0

Dec 17, 2012, 06:14 PM	#8
mikeheenan macrumors regular Join Date: Aug 2007	When are they going to release a fix for the intermittent freezing on the rMBP's?
	0

Dec 17, 2012, 07:16 PM	#10
jdegid macrumors newbie Join Date: Sep 2012	Good to know there is a fix And I agree the iMacs are Late
	0

Dec 17, 2012, 07:21 PM	#11
Catsman macrumors newbie Join Date: Dec 2010 Location: On the Coast Australia	Still problems of this nature for rMBP Mid 2012. Are they working backwards?
	0

Dec 17, 2012, 07:24 PM	#12
BSoares macrumors regular Join Date: Jun 2012 Location: USA	Both updates said not for my system. I have a 27" 2012 iMac that just arrived today.
	0

Dec 18, 2012, 04:53 AM	#13
MrMister111 macrumors 6502a Join Date: Jan 2009	Will this help my 21.5" late 2012 iMac? I have issues waking from sleep whereby it wakes to a white screen only.
	0

Dec 18, 2012, 06:39 AM	#15
chineseguy38 macrumors newbie Join Date: Sep 2012 Location: Melbourne	It makes no difference on my machine.
	0

Dec 18, 2012, 12:53 PM	#16
Jbach67 macrumors newbie Join Date: Jun 2012	and mine (5 day old iMac) says this software is not supported on my system for both upgrades. Weird.
	0

Dec 18, 2012, 03:54 PM	#17
kdavis macrumors member Join Date: May 2003 Location: Maine, USA	I posted this in another thread last night - I spent some time on the phone last night with Apple support after both of yesterday's updates failed on my 27", 2012 iMac. They were surprised at the updates not working for me and confirming that, yes, as best they could tell the updates should work on both the 21" and 27" iMacs. They downloaded info from my machine to forward on to engineering and we're scheduled to talk again on Wednesday to see what they've found out about this problem. I told them that there were others besides me experiencing this issue. Any rhyme or reason we can figure out here? Anyone with a 27 incher that had either or both of today's updates work? I'm seeing posts where the updates worked on 21" machines, and failures on 27" machines. UPDATE: looks like they've changed the download page here: http://support.apple.com/kb/DL1618 to specify that the EFI update is for the 21.5" iMac only. The WiFi update still says it is for all late 2012 Macs, but does not run on my 27"
	0

Jan 5, 2013, 12:11 AM	#21
Lil Chillbil macrumors 6502a Join Date: Jan 2012 Location: California	is it me or is apple screwing up a lot lately __________________ Pentium D 4.2GHz 8Gb DDR3 X1900xt 512mb vram 256gb intel ssd 3tb data drive Windows 7 Core i5 Quad 4GHz 16Gb DDR3 GT 640 256 gb intel ssd 8tb on-board Windows 8
	0


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