Go Back   MacRumors Forums > Apple Hardware > Desktops > Mac mini

Reply
 
Thread Tools Search this Thread Display Modes
Old Nov 7, 2012, 06:07 AM   #1
lolapaloooza
macrumors newbie
 
Join Date: Nov 2012
HELP PLEASE efi downgrade

Hi to all!!

new in this forum and need your help!!

is there a way to downgrade the mac mini efi??

I have a 2009 mac mini and installed mountain lion..didn't like it at all..
so..next thing I did was to install the snow leopard..but unfortunately because of the efi upgrade I cannot install it..

so please..can somebody explain me how I can downgrade the efi??

thank you in advance!!!
lolapaloooza is offline   0 Reply With Quote
Old Nov 7, 2012, 08:29 AM   #2
chrfr
macrumors 68020
 
Join Date: Jul 2009
Quote:
Originally Posted by lolapaloooza View Post
Hi to all!!

new in this forum and need your help!!

is there a way to downgrade the mac mini efi??

I have a 2009 mac mini and installed mountain lion..didn't like it at all..
so..next thing I did was to install the snow leopard..but unfortunately because of the efi upgrade I cannot install it..

so please..can somebody explain me how I can downgrade the efi??

thank you in advance!!!
The EFI update isn't what is blocking your install of Snow Leopard. What exact errors are you getting?
chrfr is offline   0 Reply With Quote
Old Nov 7, 2012, 10:53 AM   #3
lolapaloooza
Thread Starter
macrumors newbie
 
Join Date: Nov 2012
Quote:
Originally Posted by chrfr View Post
The EFI update isn't what is blocking your install of Snow Leopard. What exact errors are you getting?
hi!!
thank you for the reply!!!

here is the exact problem..
when I turn the mac on and hold the alt button there system does not recognise the snow leopard dvd..
but the main problem is that since I installed mountain lion is that the system when I hit alt while it starts up does not recognise the ''acronis'' boot cd.acronis is a program that makes an image of your hdd.
so I figured out that since the mountain lion installation which comes with an efi upgrade,the boot of alternative bootable cd or usb devices except m.l. is not possible.

that is why I want to downgrade it...
lolapaloooza is offline   0 Reply With Quote
Old Nov 7, 2012, 12:37 PM   #4
Darby67
macrumors 6502
 
Join Date: Jul 2011
Location: the corner of Fire and Brimstone
By your explanation, the reason you want to downgrade the EFI is so you can make an image of your HDD? There are several utilities that are very capable of this, the most obvious of which is Disk Utility which is part of the Apple OS.

If this is incorrect can you explain?
__________________
6C nMP D700s
15" 2.3 GHz QC i7 MBP
2.6 GHz QC i7 Mini & 2.3 GHz QC i7 Mini
Darby67 is offline   0 Reply With Quote
Old Nov 7, 2012, 02:05 PM   #5
chrfr
macrumors 68020
 
Join Date: Jul 2009
Quote:
Originally Posted by lolapaloooza View Post
so I figured out that since the mountain lion installation which comes with an efi upgrade,the boot of alternative bootable cd or usb devices except m.l. is not possible.
That's not the case. I'd suspect that since you have 2 DVDs which won't boot the computer that your DVD drive is faulty.
chrfr is offline   0 Reply With Quote
Old Nov 7, 2012, 05:20 PM   #6
lolapaloooza
Thread Starter
macrumors newbie
 
Join Date: Nov 2012
Quote:
Originally Posted by Darby67 View Post
By your explanation, the reason you want to downgrade the EFI is so you can make an image of your HDD? There are several utilities that are very capable of this, the most obvious of which is Disk Utility which is part of the Apple OS.

If this is incorrect can you explain?
thanx for the reply!!

that is correct!!BUT!!the problem is that I have installed windows 7 right now..and the only way to use the most compatible program that makes an image is acronis..I used this program and it was running very smooth..until the m.l. upgrade..which brought the efi upgrade to...

that's why I want to downgrade it..

is there a way???
lolapaloooza is offline   0 Reply With Quote
Old Nov 7, 2012, 09:24 PM   #7
chrfr
macrumors 68020
 
Join Date: Jul 2009
Quote:
Originally Posted by lolapaloooza View Post
that's why I want to downgrade it..

is there a way???
There is no way to backdate the EFI, but again, this is not the source of your inability to use an older operating system.
chrfr is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Desktops > Mac mini

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Resolved: Repairing EFI Junel OS X Mavericks (10.9) 5 Apr 4, 2014 07:02 AM
How to get into EFI rabidz7 MacBook Pro 10 Jul 14, 2013 06:11 PM
iPhone: IS there anyway to downgrade without shsh,even tethered downgrade FatPuppy Jailbreaks and iOS Hacks 3 May 3, 2013 09:00 PM
HowTo EFI downgrade from 1.8 to a previous version on Imac 27" Mid 2010 Computerschmied iMac 0 Sep 13, 2012 12:47 AM

Forum Jump

All times are GMT -5. The time now is 02:40 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC