Mountain Lion Bootable USB Drive

llrickman

Contributor
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Jan 12, 2008
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Albuquerque , NM
#1
Can someone post the steps to creating a USB bootable disk for Mountain Lion. I made one for the last OS X but i don't remember how i did it

Thanks

Im going to purchase a 1TB HD for my mac. My 250gb is full so it would be greatly appreciated
 

iphonewarrior

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Apr 11, 2008
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#2
Can someone post the steps to creating a USB bootable disk for Mountain Lion. I made one for the last OS X but i don't remember how i did it

Thanks

Im going to purchase a 1TB HD for my mac. My 250gb is full so it would be greatly appreciated
Do you mean you want to install ML onto an external hard drive and boot into it? It's easy-peasy-lemon-squeezy :)
 

iphonewarrior

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Apr 11, 2008
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#7
8Gb flash drives are so unbelievably cheap nowadays, you can get them from eBay or Amazon. If you have a external hard drive you could use that, if you wanted too.
 

llrickman

Contributor
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Jan 12, 2008
787
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Albuquerque , NM
#9
Ok i don't wanna sound like a dummy here . I have had Mt Lion installed since the day it came out. Where do i find that .dmg file to make this boot disk?

Ive looked and cant find it
 

Europa

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Dec 12, 2008
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#10
Ok i don't wanna sound like a dummy here . I have had Mt Lion installed since the day it came out. Where do i find that .dmg file to make this boot disk?

Ive looked and cant find it
You have to do this after downloading but before installing Mountain Lion since the install file deletes itself after installation. Unfortunately, you'll need to download the large file again if you want to make a boot drive at this point.
 

llrickman

Contributor
Silver
Jan 12, 2008
787
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Albuquerque , NM
#11
Well dang , i really don't wanna have to do that at this point. My blazing 1mps internet my In laws have here would take forever ,

Let me ask you this,
If i replace my HD (my 250gb is full )and i want to replace it with a 1TB. If everything is backed up to Time Machine i can restore the new HD from there i understand but i will STILL need a bootable disk to get to that point when i replace it wont I ?

well i guess i can try that download while im at Jury duty this week let it download while im gone.

Can i download Mt Lion again from the App store without any problems since i have already purchased it?

My disk's that came with my Mac are packed in my Pod still and i cant access them But even then that's Lion not Mt Lion
 

iphonewarrior

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Apr 11, 2008
13,847
701
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#12
Well dang , i really don't wanna have to do that at this point. My blazing 1mps internet my In laws have here would take forever

Let me ask you this....
If i replace my HD (my 250gb is full )and i want to replace it with a 1TB. If everything is backed up to Time Machine i can restore the new HD from there i understand but i will STILL need a bootable disk to get to that point when i replace it wont I ?
As long as you install Mountain Lion onto your machine first, you can then apply the TimeMachine Backup.

Can i download Mt Lion again from the App store without any problems since i have already purchased it?
Yes you can, it's the same with everything from Apple. Once you buy it, it's yours forever even if you delete it.

My disk's that came with my Mac are packed in my Pod still and i cant access them But even then that's Lion not Mt Lion
I'm not quite sure what you actually mean here?
 

MrMike6by9

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Nov 16, 2008
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#16
I'm in the process of upgrading my Spring 2011 MBP from 10.6.8 (Snow Leopard) to ML. Over thinking my needs, I bought a 1 TB Thunderbolt external and just created my USB installer/boot drive this afternoon. I've downloaded Carbon Copy Cloner and am planning to clone my installed drive shortly. I only just realized that I didn't need a full TB unit since I've only used about 1/3 of my 500GB internal drive but I'm trying to future-proof this whole thing since I also purchased an AirPort Extreme in hopes of a promised birthday gift of an AppleTV. AirPlay Baby! Now, I have to decide if I should partition the TB external for net storage/image hosting or just "damn the torpedoes, full speed ahead ..."

Film at 11:00 ....


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