Install OS X Snow Leopard form USB Key (from ISO)
In Disk Utility, select the USB Flash Drive and then Select Partition.
From here select 1 Partition and then click Options
Select GUID Partition Table so that our computer can boot from the device
Name the Volume and click Apply.
select the Flash Drive
Select the Erase tab on the right and then set Format to Mac OS Extended (Journaled). Name the partition you’ll be creating Snow Leopard or OS X Install so you can keep track of your installation device. After you’ve done this, click the Erase button.
After Disk Utility finishes erasing your old data on the flash drive and setting it as a new partition, it will be ready for the Snow Leopard install files. Select the Restore tab at the top and then drag the Snow Leopard DVD to the Source field. Select your USB device for the Destination file. Click Restore and wait for the restoration to finish (about 20 minutes).
If the restoration worked correctly you should be able to open your USB device and see the Leopard installation files. If you try and click the Install OS X Snow Leopard icon, you’ll get the message below telling you you can’ install OS X from this volume. IGNORE the message. The next steps will walk you through the installation steps.
Now that the installation files are successfully on your USB device, be sure to remove the Snow Leopard installation DVD from your drive. Next, restart your Mac and when it first starts to reboot, be sure to hold down the option (alt) key on your keyboard. After a few seconds at least two volumes should appear for you to select from for installation. One of those will be the USB drive we just prepared. Select it.
After the Snow Leopard installation software boots from your USB drive, follow the on screen instructions for installation. It took about 38 minutes to install Snow Leopard on my machine from the USB drive. I’m curious to see how this compares to the average Mac users, please leave a post in the comments letting us know how long it took on your machine.
After the installation finishes, it will reboot your computer into your new upgraded version of OS X, version 10.6 Snow Leopard
Enjoy …
Hi,
It takes also between 30 - 40 minutes on my MacBook Pro, less on my Mac Pro. I want to say 20 - 30 minutes but I have not pay attention to that as I was thrilled to install the new cat.
euh philippe, ca sert à quoi si tu as déja le disque ???
Euh Lionel, imagine que ton lecteur CD te lache, et que Apple ait eu la bonne idĂ©e de mettre un connecteur proprietaire sur le superdrive, pour eviter qu’on puisse utiliser n’importe quel lecteur CD SATA…
On fait comment…?
Merci pour cet article fort utile dans mon cas…