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techluvr

macrumors regular
Original poster
Mar 22, 2010
207
1
Houston, TX
I have a question about installing an OS to try on a USB hard disk. If I place the ISO on this drive and boot to it, and continue on with the install process, where will it install to? This is important because I do not want to lose all of my Mac files. Thanks in advance!
 

spinnerlys

Guest
Sep 7, 2008
14,328
7
forlod bygningen
Placing the ISO file onto the USB stick will do nothing. You won't be able to boot from a file. Use MRoogle to search for many similar topics (installing OS from USB device).

Also only one Mac OS X installation can be done per partition, so you need another partition to install another Mac OS X installation.
 

techluvr

macrumors regular
Original poster
Mar 22, 2010
207
1
Houston, TX
Placing the ISO file onto the USB stick will do nothing. You won't be able to boot from a file. Use MRoogle to search for many similar topics (installing OS from USB device).

Also only one Mac OS X installation can be done per partition, so you need another partition to install another Mac OS X installation.

Not trying to install OS X again, I just want to install this on the USB HDD without touching my internal. I will MRoogle. Thanks for replying so fast!
 

spinnerlys

Guest
Sep 7, 2008
14,328
7
forlod bygningen
Not trying to install OS X again, I just want to install this on the USB HDD without touching my internal. I will MRoogle. Thanks for replying so fast!

If you don't want a clean installation, you can clone your internal HDD to the external HDD via CarbonCopyCloner and SuperDuper.
 

calderone

Cancelled
Aug 28, 2009
3,743
352
You cannot boot to an ISO.

If I am following you correctly, you want to install an OS onto a USB Drive.

If that is the case you will need to restore the ISO to some medium. Whether it be an external hard drive, a CD, or DVD.

You would then boot to that medium.

The installer for this OS should give you options. Since I don't know the OS you are wanting to try, I can't comment much further.
 

techluvr

macrumors regular
Original poster
Mar 22, 2010
207
1
Houston, TX
You cannot boot to an ISO.

If I am following you correctly, you want to install an OS onto a USB Drive.

If that is the case you will need to restore the ISO to some medium. Whether it be an external hard drive, a CD, or DVD.

You would then boot to that medium.

The installer for this OS should give you options. Since I don't know the OS you are wanting to try, I can't comment much further.

That is correct.

I have extracted the contents of the ISO and placed them in the uppermost directory on this hard drive.

I am presuming that the drive is now bootable.

I am trying to install Windows 7. Would this installer allow me to place the new installation onto this drive?
Thank you!
 

Fry-man22

macrumors 6502
Nov 25, 2007
455
26
That is correct.

I have extracted the contents of the ISO and placed them in the uppermost directory on this hard drive.

I am presuming that the drive is now bootable.

I am trying to install Windows 7. Would this installer allow me to place the new installation onto this drive?
Thank you!

You presume incorrectly. You just have a USB stick with Windows install files. If you have a Windows PC to create the Boot USB from you can use this tool from microsoft and your ISO.

http://images2.store.microsoft.com/prod/clustera/framework/w7udt/1.0/en-us/Windows7-USB-DVD-tool.exe
 
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