I just applied an EFI firmware update to a intel core 2 duo macbook, now it won't boot up

After applying an EFI firmware update, the Macbook just spins the optical drive when I start it up! I didn't see any indication that the EFI firmware update had any problems, so I'm stumped!

And if you can't get in, you can't read the Boot Rom version…
I suspect the update may have been OK for the MB but not for the OS version.
Unfortunately I have no idea if it's even possible to roll back a firmware update, or to maybe install a later OS like 10.6 while it's in that condition.
Bigger guns than me needed here, I'm afraid.

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I updated Efi firmware, but force quit twitter to install. Now system won't come on, it just shows grey screen with the spinning wheel loading. I am running lion 10.7.3

I updated Efi firmware, but force quit twitter to install. Now system won't come on, it just shows grey screen with the spinning wheel loading. I am running lion 10.7.3.
Thank you

The following support article is somewhat outdated. Where it refers to booting from an installation disc, you should boot from your recovery partition (if running 10.7 or later) by holding down the key combination command-R at the chime.
Mac OS X: Gray screen appears during startup

Installed the latest Java update today on my older iMac and now it won't boot up at all. 2007 model worked fine this morning, now disk first aid say boot blocks f'ed.

I am using an older mid 2007 imac 24 inch running snow leopard 10.6.8
I normally accept software update recs, and today when installing the security update to java, all went fine till restart, when I got the universal "NO" sign, the circle with the line through it and just spinning gray bars underneath.
Booted from system disks, ran first aid, said the boot block partitions or something like that needed updating but disk appears to be ok. Still not working.
Do you think Alsoft Disk Warrior will fix? I am running off external back up drive now.
Thanks for any help or advice. Apple as usual is as useless as tits on a bull, or a screen door on a submarine, pick your simile...

If your backup's up to date it might be less hassle to erase the internal and clone back from the backup. Don't allow the update next time it appears - you're not the only one having problems it would seem.
Note; the message "updating boot partitions" is a standard message that appears after a repair run. It won't go away and should be ignored.
Provided the message "The volume Macintosh HD Seems to be OK" in green has appeared, your disc fle system is fine.
Message was edited by: noondaywitch

2006 Mac Pro & EFI Firmware Update 1.2

Wondering if anyone has any thoughts on this...
Just upgraded to Snow Leopard and was prompted to apply the EFI Firmware Update 1.2... so I did as requested... MP shuts down and I hold down the power button until I see the power light pulse rapidly... I see what looks like the start of an update (w/ the progress bar) but then the MP immediately reboots, returning to the Update application...
I should mention I tried holding down the power button through the tone as well, to no avail...
My Boot ROM Version: MP11.005C.B00
Thanks!

Some tests of Leopard vs Snow Leopard and 32-bit vs 64-bit
http://macperformanceguide.com/SnowLeopard-Performance.html
Snow Leopard is faster than Leopard regardless of 32/64-bit issue. Tests were of course done on a 2009 and using 4-drive stripe (to reduce impact of disk I/O from tests).
OpenCL synthetic tests (there aren't any apps that tap into this technology)
http://www.barefeats.com/opencl.html
Reasons why you may not want the slight advantage 64-bit mode offers (from PerformanceGuide):
*Sonnet Tempo E4P* Sonnet suggest that there will be some issues with 64-bit mode, but should be resolved quickly. Running in 32-bit mode should be fine. Be sure to update to driver version 2.1.9 (or later if there is one).

EFI Firmware update kills Airport

I just installed the EFI firmware update w/o trouble. However, upon reboot I noticed the airport was gone from the menu bar. I booted Safari and got "not connected."
I then opened the network sys pref's and when I try to connect I get "No Airport Hardware Found."
Under System Profiler I see "No info found" under the airport tab.
Any help? Thanks!

Called Applecare. Always polite and helpful. Found solution to this airport problem.Here are the steps:
Turn off your mac.
Take off your battery, disconnect the power cord.
Then press the power button for 5 seconds.
Replace battery and power cord and restart your mac.
Now airport should be back. Hope it helps as it helped me

MacBook Pro EFI Firmware Update - sw update now

sw update offered it just now, applied. airport icon on top taskbar missing on reboot, but easily reapplied.
will monitor.

Now I am just numb. I should state that I have a 17" MBP (stock). It refuses to shut down (I have to hold the power button down). I have already burned and tried the EFI recovery CD with no success. I can't even do a simple reboot! It clears my dock and menu bar and the regular cursor just stays up all the time. I've let it sit for over 10 minutes hoping for a restart or shut down.
When the machine does boot (after hard stop and start) it always reverts to the EFI Firmware Update 1.2 screen.
Anyone else having issue?

Mac mini EFI Firmware Update 1.7 Not supported on system.

I am attempting to install the Mac mini EFI Firmware Update 1.7 on my 2012 Mac Mini (just purchased) to solve my flickering display problem. When trying to install the update, it states that the software is not supported on my system. I am connected directly to my HP 2311x monitor by a HDMI cable. I can't seem to find an alternative solution to this problem.

Model Name: Mac miniHere's the information in my System Report:
Model Identifier: Macmini6,1
Processor Name: Intel Core i5
Processor Speed: 2.5 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 4 GB
Boot ROM Version: MM61.0106.B04
SMC Version (system): 2.7f1
Hope this helps.

After installing an SSD into my optical bay, I've found out I need EFI Firmware Update 2.2. I can only find 2.3 which is not supported on my Mac. What can I do?

After installing an SSD into my optical bay, I've found out I need EFI Firmware Update 2.2. I can only find 2.3 which is not supported on my Mac. What can I do?

You do not want EFI 2.2, it bricked many 2011 MacBook Pro machines.
EFI 2.3 is the fix. Software Update should install it if you need it, but it goes to the boot drive as that's where the hidden EFI resides.
Check out this link of machines and their EFI versions
https://support.apple.com/kb/HT1237
Also if your SSD should be in the hard drive bay as it makes a better boot/applicaitions drive, not a good storage drive as it wears out with repeated use and is not "scrubbable" like a regular hard drive
The hard drive should be in the optical bay and used as a storage drive, you have things all messed up inside your machine, Apple doesn't support or expect the optical drive to be used as such to begin with, then as a boot drive is just asking for trouble. So use the optical bay as storage and not as a boot bay.
Also you can't install OS X or Windows or use a Firmware restore disk because it only works from a internal optical drive, which you have removed.
https://support.apple.com/kb/HT2213
You need to learn all about cloning etc., as you have no other means to boot the machine.
https://discussions.apple.com/message/16276201#16276201

Late 2011 MacBook Pro running Mountain Lion with app: "iMac EFI Firmware update"

I have an app on my MacBook Pro late 2011 model, by the name "iMac EFI Firmware update" that my computer says is useless... can I uninstall it using CleanMyMac without corrupting my OS Mountain Lion or simply dragging it to the garbage?

You can delete it. Just drag it to the Trash and this installer will be removed. As you have already installed this update, you don't need the installer anymore on the hard drive

MacBook Pro EFI Firmware Update 1.5.1 Multiple Times

for about 6 months or longer now I keep getting the same software update every few weeks on my Macbook pro. it's 1.5.1. i've probably installed it 5+ times now, and now I just uncheck the box and do the other updates. how do i get rid of this darn thing, since i have already done it? now it's just starting to annoy me.

Hi chuck,
Head to your "Utilities" folder and you will find that Software update has installed an application called "MacBook Pro EFI Firmware Update"
You should first restart your computer, disconnect any peripherals , and then run the application, following the instructions carefully along the way.
For safety reasons Software update doesn't actually install firmware updates like this itself . Instead it installs an installer. While I can understand the desire for safety, I reckon Apple could have been a bit better with the instructions on this one, as it is not at all apparent that this second step is required after running Software update to actually install the new firmware.
You aren't alone on this one. I've seen many, many posts here from people who haven't known that the second step was necessary and, accordingly, keep on getting new downloads of the installer from SU.
Cheers
Rod
Cheers
Rod

MacBook Pro EFI Firmware Update 1.5.1

Just seen this as available from the software update process on my MBP.
has anyone hand any problems with MacBook Pro EFI Firmware Update 1.5.1 updates?
thanks!

I believe it's been traced to the video card not properly initializing after sleep. It normally happens to me when I have USB peripherals attached (Such as my iPhone for charging).
After sleep the screen simply won't turn on. You can hear the volume adjusting, even music or something playing on the computer (As if it's running normally) but the screen just stays black. Sometimes it will flash on and then turn off.
The only solution I've found is to hard reboot the computer.

MacBook Pro EFI Firmware Update 1.5.1 messed up my laptop

Software update just told me to install MacBook Pro EFI Firmware Update 1.5.1 a few minutes ago, and I followed the directions, having no idea what it was supposed to be doing to my computer. I hit "Shut Down", then held down the power button until I heard the beep. After the beep, the screen stayed black and the LED light just stayed constant. Then I turned the computer off using the start button again, and tried to turn it on. The hard drive or CD drive started to click rhythmically and the computer did nothing. The screen stayed black.
I then tried to restore the previous firmware, but that doesn't work. It said to hold the button until the lights flash fast, then slow, then to insert the restoration CD, which I did. It buzzed like it was going to start up, then did nothing and I got no progress screen. It still just sits there black with that power light on. Anyone got any ideas other that going to a Genius and paying hundreds of dollars?
Message was edited by: Cathy821

I followed the EFI instructions exactly as it stated and had a major problem.
Basically my problem was that the EFI did not completely successfully. It left the system in a half updated state. Unfortunately, they had to replace my entire system board. I have Apple Care so it was replaced at no charge. I originally called Apple Support and they had me try the usual things like restoration cd, reset PRAM, reset NVRAM, etc. Nothing worked. I brought it down to my local Apple store but they more or less do the same thing. They had to send it out to be fixed. Sorry, but it sounds like you're in the same boat.

MacBook Pro EFI Firmware Update/Keyboard update- Do I need this?

Software update is offering me the MacBook Pro EFI Firmware update and a Keyboard Firmware update.
I have not experienced any issues at all with my MacBook Pro.
Should I install these updates anyway?
What is the best practice? Should one just update everything all the time? If I do not, could I fall behind, and could I be forced to dig up older updates down the road to catch up?
Thanks.
Message was edited by: Trisha K

"These updates do not offer any links or further information."
If software update does not offer an explaination, then it can be found in Apple Downloads.
About Mac Pro EFI Firmware Update
About MacBook, MacBook Pro Keyboard Firmware Update

Macbook pro EFI firmware Update 1.4 won't work, neither will software

I got two probs, not sure how related they are.
#1 is that I can't successfully do the macbook pro EFI firmware Update 1.4. My computer was bootcamped and kept restarting in windows - thus the update was not completed - the completion bar would pop up for an instant - i could not see if it had completed, i don't think so... and then it would flash back to black, and restart again. Upon restart the firmware update was still there as needing to be updated.
I've now taken bootcamp off and restored a single drive. It's doing the same thing and hasn't updated.
#2 is that DVD studio pro will not boot anymore after it has been working with no problems for over a year. Nor will Motion run although it has never worked. I have tried reinstalling multiple times and just today went to delete the preferences. No luck.
Any suggestions or better yet, solution, I'm ever so grateful.
Cheers
-k

I have the same problem. It's also important to note that, in my case, I'm running 10.7.2 (11C74), but it's a firmware update, so it shouldn't really matter if I'm running a beta version of Lion, should it?

MacBook Pro EFI Firmware Update 2.7: installed or not?

I have MacBook Pro EFI Firmware Update 2.7 showing as installed on Mar 17, 2015 on my AppStore Updates page; it also shows up as installed on Mar 18, 2015 and yet Mavericks wants to install it again.
I seriously doubt this update has been updated so many times, something just doesn't seem right.
Questions: what should I do? Is there a way to get rid off this annoying (1) showing on the AppStore updates?
Thanks!
Fernando

I have also been getting an error message that reads "An error has occurred" "The digital signature on Mac Book Pro EFI Firmware Update is missing or invalid. The update may have been tampered with since being signed by Apple. Click Update to download and check the update again.(203)" [OK]
This seems to indicate some sort of problem with/in the Apple Store, don't you think? Who do we call, Ghostbusters? :-) Hello, Apple, you there?
Thanks for replying!
Fernando

I just applied an EFI firmware update to a intel core 2 duo macbook, now it won't boot up

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