OSX on External Drive

Macmadant

macrumors 6502a
Original poster
Jun 4, 2005
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I Recently Brought a Core 2 Duo iMac, i came to install the Intel OSX on to a USB 2.0 Drive, however it told me i couldn't but i was under the impression that you could install OSX on USB 2.0 on the new Intel macs, Obviously not
 

xUKHCx

Administrator emeritus
Jan 15, 2006
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The Kop
What you have to do is open Disk Utility, Select the drive, select partion, select options, change it to GUID partion table. Then you can install OSX on it, definately works from USB 2. Currently booted from an external myself as a kernal panic compelety destroyed my internal drive.

EDit: Incase you just read this, partioning the drive will wipe your data. You do not need to make 2 partitions, it is just a case of getting the drive in the correct format for intel macs
 

Macmadant

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Original poster
Jun 4, 2005
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xUKHCx said:
What you have to do is open Disk Utility, Select the drive, select partion, select options, change it to GUID partion table. Then you can install OSX on it, definately works from USB 2. Currently booted from an external myself as a kernal panic compelety destroyed my internal drive.
Thanks, by the way does partitioning a drive wipe any data you have on it, and i have to partition it into two drives and install OSX on one of them ?
 

xUKHCx

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Jan 15, 2006
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The Kop
Macmadant said:
Thanks, by the way does partitioning a drive wipe any data you have on it, and i have to partition it into two drives and install OSX on one of them ?
Good question, should have mentioned it before. I think it will destroy all data on the drive. You can partion it as one drive.
 

Macmadant

macrumors 6502a
Original poster
Jun 4, 2005
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Yeah, i went on that thing changed it to GUID, but then it just changes itself back, so i guess i have to partition it as a GUID
 

crees!

macrumors 68000
Jun 14, 2003
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But with BootCamp you can resize your partitions without erasing the entire drive correct? I guess this will be put in the 10.5 version of Disk Utility.
 

Macmadant

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Jun 4, 2005
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crees! said:
But with BootCamp you can resize your partitions without erasing the entire drive correct? I guess this will be put in the 10.5 version of Disk Utility.
Hopefully
 

xUKHCx

Administrator emeritus
Jan 15, 2006
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The Kop
I did this myself though, definately works. Change the option to GUID then hit the partition button. As long as you have the partition scheme set to one partition it will remain as one drive.
 

Anonymous Freak

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Dec 12, 2002
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To answer the original question, yes, Intel Macs can boot from a USB drive, as long as it is repartitioned with the GUID Partition Table (GPT) system.
 

beatsme

macrumors 65816
Oct 6, 2005
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xUKHCx said:
Good question, should have mentioned it before. I think it will destroy all data on the drive. You can partion it as one drive.
DiskUtility will destroy all data, though iPartition will allow you to create/resize/delete volumes dynamically i.e. without erasing the whole thing. A bit pricey, though
 

plinden

macrumors 68040
Apr 8, 2004
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gparted is free and can shrink HFS+ partitions (allowing you to reformat the free space)

Well, in theory. I have personally used it for Linux and NTFS partitions but not HFS+

And my wife ran her MacBook off a USB 2 drive for the week we were waiting for the Apple Store to get a replacement HD.
 
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