Deleted mac partition by mistake - How do I bring it back?

[sweetmirage]

Right. So I got a virus on my Windows -> booted up on my Windows XP install disk to format the partition -> the CD told me to delete the partition first, which went WRONG and I deleted the whole thing I guess. Sigh.

So now I have only the Windows part, which I found out when I realized my new Windows was 200 Gigs bigger than before.
I know that I can't actually fetch the lost Mac partition back
but how do I install the Mac OSX back into my computer? Is that possible?
And also, if it is possible, would it run the same way as it did before, because now the partition process is the other way around (windows is the main partition and Mac is the one being installed later)?

A reply would be so very appreciated. Thank you.

 

[ZBoater]

I did the same thing on my 1-day old MacBook Air. It didn't come with a recovery USB stick, and the Internet recovery option wasn't working. I took it to my local Apple store and at the time they hadn't gotten their Lion recovery drives. I mean, the MBA had just been released the day before.

They gave me a new laptop an I am now a lot more careful using disk utilities in Windows...

 

[mackeeper22]

Re:

With two separate installations of two different OS having gone over the top of the old data, I doubt if you can recover it.

 

[Quad5Ny]

How to Clean Install OS X

Part One: Partitioning the hard drive

1. Insert the Mac OS X Install DVD into the optical drive, or insert the Software Reinstall Drive into the USB port.
   
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2. Turn on or restart the computer.
   
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3. Press and hold the Option key at startup to select the volume containing the installer.
   
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4. If your are using a wireless mouse, a mouse icon should appear asking you to turn the mouse on so that the computer can discover it.
   
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5. Select a language, then press the right arrow key.
   
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6. Click the Utilities menu, the choose Disk Utility.
   
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7. In the box to the left Select your hard drive.
   
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8. Click the Partition tab.
   
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9. Under Volume Scheme choose "1 Partition" (This will Erase the Entire drive, including Boot Camp Partitions)
   
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10. Click the Options button and make sure "GUID Partition Table" is selected.
    
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11. To the right of Format choose "Mac OS Extended (Journaled)".
    
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12. To the right of Name Type "Macintosh HD".
    
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13. Click Apply.
    
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14. After the partition is formatted, choose Quit Disk Utility from the Disk Utility menu.

Part Two: Installing the operating system

1. When the Mac OS X Installer screen appears, click Continue.
   
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2. When the license agreement appears, click Agree.
   
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3. Select the disk you partitioned. It should now be highlighted with a green arrow.
   
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4. Click Install. A status bar appears on the bottom of the screen while Mac OS X installs.
   
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5. An Additional Information screen appears, advising you that you operating system has been installed. Click Continue.
   
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6. An Install Succeeded screen appears. Click Restart.

Original Steps Edited from: http://support.apple.com/kb/ht3910