라이언이 설치된 맥 설범으로 다운그레이드 방법.

 그냥 구글에서 검색하다 빼온것이지만 최근에 구매한 2011 Imac 27'에도 적용이 될 가능성이 있다고 생각한다.

 

10.7.3버전으로 구매한 맥의 라이언 OS상에서 안된다고 하는 방법들.

 

1. Target Mode 안됨

2. 복구 DVD 안됨

3. 리테일 디스크 안됨.

4. 타임 머신 복구 안됨

5. DMG/IMG 설치 안됨

 

가능할수도 있는 방법은 아래와 같다.

 

1. 코드 변경 (밑에 참조)

2. 외장하드에 OS 설치후 CCC나 SuperDuper로 복사

3. 설범이 설치된 하드를 교체.

 

이것을 하게되면 문제시 Warranty나 아이케어에 관한 조항은 잘 모르겠다. 애플케어에 전화를 걸었더니, 설범으로 다운그레이드는 '불가능' 하다는 나의 도전의식에 불붙는 이야기를 하였다.

 

 

나는 Snow Leopard가 필요하다..

 

Why do we need this? Because Apple quit releasing full retail versions of Snow Leopard with 10.6.3. If you have an Apple computer made after the Core 2 Duos, the 10.6.3 retail disk may not boot, and the 10.6.0 version won't boot at all. Early 2011 MacBook Pros fall in this category. Version 10.6.7 was the last version released on DVD, but the DVDs were locked to specific machines. We are are going to unlock a 10.6.7 DVD and make it a universal Installer.

How to do it:

• Use Disk Utility to make a read/write DMG of a 10.6.7 install disk for a MacBook Pro or iMac. Version 10.6.6 might work, but I haven't tried it.
• Set the Finder to reveal hidden files:
• open Terminal and type or copy and paste the following line:
  
  defaults write com.apple.finder AppleShowAllFiles TRUE
  
  
• Press the Enter key.
• Then type:
  
  killall Finder
  
  
• Press the Enter key again.
• To reverse this, rerun with FALSE instead of TRUE and killall Finder again
• Insert a 10.6.0 or 10.6.3 OSX retail installation disk in your DVD drive and use the Finder to open the disk to system/Installation/Packages/
• One of these package files is OSInstall.mpkg which is the set of instructions for the Installer. This file in the 10.6.7 Installer is where the checking is done to see if it's installing to the 'correct' computer.
• Open another Finder window, and navigate to the same place in the 10.6.7 Installer. Replace the existing OSInstall.mpkg file with the one from the retail disk plus copy over all the printer related Installer packages. We do this because the retail installation script won't install the 10.6.7 printer packages. Check the 'copy all' box when the Finder warns you that the files already exist.
• Open Disk Utility and plug in an 8 gig thumb drive. Find the drive on the left side of the Disk Utility window and click on it. Now click Partition, chose 1 Partition, give it a name and click the Options button. Choose the GUID partition choice and close the window. Click the Partition button. When the Disk Utility is done, use SuperDuper or Carbon Copy Cloner to clone the modified 10.6.7 Installer to the 8 gig keychain drive. I had problems getting the Backup utility in Disk Utility to do this. You can boot any ready for Snow Leopard Mac with this Installer.

[crarko adds: I know we've published hints like this in the past, but I just want to point out that the intent here is not to rip off Apple, but to handle what can be a very messy systems management issue in environments with many different models of Macs, using the tools that are available.]

 

 

 

다른 방법으로는..

 

 

 

How To - NetRestore - Install Mac OS X 10.6.8 on a new Mac delivered with Mac OS X 10.7.0

1 Preparation

1.1 Required resources:

• A host computer, running Mac OS X 10.6.8 [note: I personally think you can use a 10.6.7 host in a pinch]
• Your target computer: the one you're going to downgrade from Lion.
  
• Snow Leopard retail installation disc (e.g. Mac OS X 10.6.0 or 10.6.3 Box Set)
• A Firewire 400->400 or 400->800 or 800-> cable (although I'm thinking if you've got an external/thumb drive that's big enough, you might be able to do this without the Firewire cable but it'll add a number of steps not yet posted... see this Apple Discussion forum for updates for now if you don't have a Firewire cable....https://discussions.apple.com/message/16191464#16191464)
  

1.2 Downloadable resources:

• Snow Leopard 10.6.8 Combo Updater v 1.1 disk image file (free download from Apple Support Downloads) http://support.apple.com/kb/DL1399
• System Image Utility 10.6.8 (free download from Apple Support Downloads - is part of Server Admin Tools) http://support.apple.com/kb/DL1403 and install it on your host/working 10.6.8 computer (if your host computer is at 10.6.7, try Server Admin Tools 10.6.7 http://support.apple.com/kb/DL1365)

1.3 Back up Lion If you don't back up Lion in some way now, you won't be able to get it back later. At a minimum you should use Apple's instructions for creating a Lion Recovery disk and make a bootable Lion recovery thumb drive! http://support.apple.com/kb/DL1433

Of course, if you're savvy, you can also dupe your entire Lion install to some other hard drive using something like Carbon Copy Cloner or SuperDuper.

1.4 Create the Snow Leopard Disk Image

1. Insert your Snow Leopard 10.6.3 (or 10.6.0) install disk in an optical drive of your 10.6.8 host/working Mac.
2. Open Disk Utility (in the Applications/Utility folder)
3. Select the Snow Leopard install disk from the offerings in the left side of the window
4. Find the menu selection that is something like "Disk Image from...."
5. Specify a destination (on your host or available external drive) and click save

click on image to enlarge

2 "The Procedure"

2.1 Part A. Creating the NetRestore image

Note: everything in this section is done on the host/working 10.6.8 computer.

1. Mount the base source image by doubleclicking it (e.g. Mac OS X 10.6.3.dmg - created from the retail installer in the previous step “Creating the Snow Leopard Disk Image"). Wait for it to mount.
   
2. Launch System Image Utility (when you downloaded and installed Server Admin Tools above, it installed System Image Utility (SIU))
   
3. When source (from mounted image) appears in System Image Utility screen, click "Customize" button (it will look like this)
   
4. Drag "Customize Package Selection" from Automator Library window to location between existing "Define Image Source" and "Create Image" (from here)
   
5. Drag "Add Packages and Post-Install Scripts" from Automator Library to location between "Customize Package Selection" and "Create Image" (it will look something like this)
   
6. In the "Customize Package Selection" section:
   1. expand the "Mac OS X" triangle
   2. elect options desired
   3. collapse the "Mac OS X" triangle
7. Mount the 10.6.8 combo update image (double-click your downloaded MacOSXUpdCombo10.6.8.dmg)
8. Copy (drag) the MacOSXUpdCombo10.6.8.pkg package to a new local directory (Desktop/workingFiles/ or whatever) like so. Don't try to skip this.
   
9. Drag your MacOSXUpdCombo10.6.8.pkg icon from your local directory to the "Add Packages and Post-Install Scripts" section of the System Image Utility window.
   
10. In the "Create Image" section (example):
    1. select the type "NetRestore"
    2. set the "Installed Volume:" field to "Macintosh HD" (no quotes, can be any name you'd like)
    3. select the "Save To:" location (will be faster to a second local internal disk) (not faster to another partition on the same disk)
    4. set the "Image Name:" field to "Snow Leopard 10.6.8 NetRestore"
    5. the fields "Network Disk:", "Description:", and "Image Index:" don't matter unless one is going to use results on a NetBoot Server
11. You may click the Run button [HOWEVER, as you can see in step 12, a prompt will appear deep into image creation that pauses it from completion. User "Oliver W" suggests that to skip this prompt you may do the following before clicking Run:
1. Quit System Image Utility and you will be prompted to save your workflow. Do so.
2. When SIU has quit, doubleclick your saved workflow.
3. Hit the "PLAY" button (triangle) (execute or run) that appears and it should do the same as steps 11 and 12 ]
   
12. If you don't try the tip in step 11, after a long while, a dialogue will appear "Image creation in progress. Cancel the image creation to proceed" ignore the text and click OK for proper completion (this does not appear until completion of the image creation). This is a good sign but it may keep doing stuff for a long while after you hit OK.
    

2.2 Part B. Post-process to create Restore Image

1. Find the directory created in the above process, named as in A10.4 above (e.g. "Snow Leopard 10.6.8 NetRestore.nbi")
2. In this directory are three files:
   1. i386
   2. NBImageInfo.plist
   3. NetInstall.dmg
3. Mount the NetInstall image (double-click the NetInstall.dmg file)
4. Navigate into the Contents of the package, to: System/Installation/Packages/ (like so)
5. Copy the System.dmg file out to desktop or other work location
6. Rename System.dmg to meaningful name, such as "Snow Leopard 10.6.8 System.dmg"
7. You can actually copy this .dmg file to any external, bootable, Snow Leopard 10.6.8 system disk (copy to /Users/Shared/ for access from any User account) for future restores but for our purposes, we're going to use it from our host/working 10.6.8 computer.

2.3 Part C. Install Snow Leopard 10.6.8 on new MacBook Pro or Mac Pro

2.3.1 Install via DiskUtility GUI

1. The Mac being downgraded from Lion (target system) should be off. Connect your Firewire cable between your target computer and your host.
2. Boot the target Mac you're going to downgrade while holding down the T key until a Firewire logo appears on its screen.
3. Back at your host computer, you will now see the hard drive name of your target system mount on your host desktop (it might only appear on left side of a folder/Finder window if you've got your hard drives hidden from your desktop.)
   
   note: There are a number of ways to utilize Target Disk Mode and Disk Utility to restore our 10.6.8 image to our Lion Mac. You can boot your host computer or target computer using any bootable 10.6.8 drive. You hold down "T" to put machines in Target Disk Mode (TDM) and you can hold down "option" during boot to force machines to use other/external 10.6.8 drives. I think it's easiest just to continue using the host computer as we have been.
   
   
4. Launch Applications/Utilities/DiskUtility.app
5. Select the computer hard drive (typically "Macintosh HD" but it doesn't really matter yet.)
   
6. Click on the "Restore" tab
7. Click on the "Image..." button to specify the "Source"
8. Navigate to where you saved/renamed the System.dmg file aka "Snow Leopard 10.6.8 System.dmg"
   
9. Drag the target computer-you-want-to-downgrade hard drive volume ("Macintosh HD") to the "Destination" field **(note: grab the volume name, not the disk!!)
   
   NOTE! If both your host computer and target computer are named "Macintosh HD" you must dig a little to ensure you have the correct volume! Step #4 from this page details a little bit of how to differentiate your hard drives (and how to create another partition on your target Mac if you intend to dual boot Lion/Snow Leo, just be careful!) but it really depends on how you booted/connected them just now. Look for drive sizes and content (your soon-to-be-erased Lion volume should have considerably less data used than your host computer does but it may be a bigger drive overall.)
   
   
10. Enable the "Erase destination" checkbox
11. Click the "Restore" button
12. In the ensuing "Are you sure?" dialog, click the "Erase" button
13. Authenticate with the local admin credentials

2.3.2 Install via command line

1. boot MacBook Pro or Mac Pro from external source prepared in B.7
2. open Terminal
3. find the restore target device specification
   1. run the command "diskutil list"
   2. look for a 650 MB partition, labelled "Recovery HD" (likely disk0s3)
   3. the target partition should be immediately prior to the "Recovery HD" partition
   4. for a new computer with a 500 GB drive, this partition should be labelled "Macintosh HD", with a size of 499.2 GB
   5. make note of its Device Identifier, likely disk0s2
4. issue the following asr (Apple Software Restore) command:

sudo asr restore --source "/path/to/restore.dmg" --target /dev/disk0s2 –erase

(replace "/path/to/restore.dmg" with the path to the location and name used in step b.7)

This process proceeds and completes quickly, about 3-5 minutes. This is due to:

1. the "--erase" parameter; it indicates a block-copy operation
2. If the process seems slow, likely the "--erase" option was omitted and the copy is being done as a file-copy operation. Quit (ctl-c) and examine the command used...

Apple Tech recommends leaving the Restore partition alone, and installing in the "Macintosh HD" partition only

3 Housekeeping

When the restore is done, quit Disk Utility and eject your target/downgraded Mac. Once it is safely unmounted/ejected, you can shut it down.

Now boot it up again (in a two-partition dual-boot system, hold down the option key during boot to select the Snow Leo partition manually). It should boot Snow Leopard 10.6.8! You can run Software Update (Apple menu) right away OR, if you like to be thorough, download/run the 10.6.8 v 1.1 Combo Updater again, reboot, then run Software Update.

4 Commands for Geeks

related commands for geeks to know:

• asr
• diskutil (diskutil -list to see partitions)
• hdiutil

5 Contributors

- Tech Harmony (need one say more?)
- zirkenz (a digger with great curiosity)
- Josh1565 (a producer of fine leather-bound texts)
- almage (a wandering musician and student of wonderment)
 
 
 
Source: http://sites.google.com/site/downgradeyourmac/the-procedure