Currently Being ModeratedFeb 7, 2013 12:47 PM (in response to CubbyChowder)
1. 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 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.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
7. Upon completion quit DU and return to the installer. Install Snow Leopard.
8 Download and install Mac OS X 10.6.8 Update Combo v1.1
You may now use the App Store to purchase and download Mountain Lion.
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
Macs that can be upgraded to OS X Mountain Lion
1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
7. Xserve (Early 2009) - Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
Are my applications compatible?
For a complete How-To introduction from Apple see Upgrade to OS X Mountain Lion.
Currently Being ModeratedFeb 7, 2013 12:49 PM (in response to Kappy)
Thank you for the reply, but I noted that I don't have my installer disk. I was asking how I should go about this since I don't have it anymore.
Currently Being ModeratedFeb 7, 2013 12:53 PM (in response to CubbyChowder)
You will need to contact Apple to order replacement media. There will be a nominal charge for this, you will need the serial number and a credit card. You can locate the SN on the bottom of the computer's stand.
Without install media or without a bootable clone backup you cannot progress so spend the $30 or so to get your media replaced.
Currently Being ModeratedFeb 7, 2013 12:59 PM (in response to CubbyChowder)
Purchase Snow Leopard through the Apple Store: Mac OS X 10.6 Snow Leopard - Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order.
You can also purchase replacements for your computer's original discs by contacting: Customer Service: Contacting Apple for support and service - this includes international calling numbers.