Clean install of ML from bootable disk, Snow Leopard original OS...
Hi all,
I visited my apple store on Sunday who suggested I should reinstall my operating system from scratch.
My MBP is 2009 and I believe came with Snow Leopard installed on it. I have the original disks that came with it to do a fresh install of Snow Leopard, however I am currently running ML.
Do I need to install Snow Leopard, then Lion then upgrade to ML again or can I just boot and do a clean install straight from the USB?
Any help would be appreciated
Thanks,
Sarah
Do I need to install Snow Leopard, then Lion then upgrade to ML again?
No, it's on a bootable partition now called Recovery HD, hold command r and boot the machine, use Disk Utility to erase the Macintosh HD partition (all files, programs and OS X will be gone) reinstall OS X, you will need a fast internet connection and your AppleID and password.
https://support.apple.com/kb/HT4718
If you don't have a backup, need to perform data recovery BEFORE erasing or reformating the Macintosh HD partiton, then do this, just because OS X isn't booting means you can't access the drive and grab files off.
Create a data recovery/undelete external boot drive
You might be able to fix your problem in place, without a messy erase and install, that's a last option in my book
Run through this and see if it clears your issue, or least gets OSX to boot so you can copy files and important information off first.
Step by Step to fix your Mac
If you have a boot hard drive, when you erase the Macintosh HD partition, use the Security > Erase middle selection as this will improve the drive's data retention. SSD's no need and it's not available.
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Hello,
How can I uprade from TIGER to SNOW LEOPARD? Do I simply use the upgrade snow leopard to do so? Will that create any instability or issues?
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AlexYes, you can upgrade from Tiger to Snow by purchasing the SL DVD. Doing so would only create stability problems if you already have problems, so you should be sure you have a clean system before upgrading. See the following:
System Upgrade and Installation Procedure
Basic Caveats
1. Disconnect all peripherals except the original mouse and keyboard.
2. Quit all applications if this is not an installation from an Installer DVD.
3. The installation process should not be interrupted. If a power outage or other interruption occurs during installation you may have to erase the hard drive and reinstall from scratch.
4. Once the installation begins do not use the computer in any way except to reply to dialog prompts or to restart when the installation is completed. This is especially critical during the installation stage known as "Optimizing the System."
System Update Procedure
A. Repair hard drive and permissions.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger or Leopard.) After DU loads select your OS X volume from the list on the left, click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.1 for Leopard) and/or TechTool Pro (4.6.2 for Leopard) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X. Note that Disk Warrior will not work on Intel Macs.
B. Clone your existing system to an external Firewire drive.
How to Clone Using Restore Option of Disk Utility
1. Open Disk Utility from the Utilities folder.
2. Select the startup or source volume from the left side list.
3. Click on the Restore tab in the DU main window.
4. Drag the startup or source volume to the Source entry field.
5. Select the backup or destination volume from the leftside list and drag it to the Destination entry field.
6. Check the box to Erase Destination. Skip this step if you've already formatted the drive.
7. Double-check you got it right, then click on the Restore button.
C. Decide upon an installation option (This does not apply to Snow Leopard.)
You have three upgrade options. If you use the Upgrade installation option be sure you have repaired the hard drive and permissions first and made your backup. If you choose the Archive and Install option then you only need to repair the hard drive.
Neither of the above options will erase the disk. Some of your software may not work with a new system. You will need to upgrade those programs. It would be best to do the upgrades to your software before upgrading to the new system version.
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I backed up my system using 10.6 Snow Leopard's Time Machine to an external hard drive. I did this because I purchased a new internal hard drive to upgrade my 2007 White Macbook from 80GB to 320GB. When I installed the new hard drive, I installed 10.4 (Tiger) and then 10.5 (Leopard) and once Leopard was in I tried to use Time Machine to restore my backup from 10.6 (Snow Leopard) and received a kernal panic screen directly after the bootup.
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1. Insert Snow Leopard Installer Disc into the optical drive.
2. Restart the computer.
3. Immediately after the chime press and hold down the "C" key.
4. Release the key when the spinning gear below the dark gray Apple logo appears.
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Drive Preparation and Installation
1. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
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