Installing Lion from external media

Hi all,
my situation is as follows: I have 2 Macs, both of which I'm the owner of. No, one of them (Mac Pro) has fast internet access, and is already running Lion. The other machine (Mac Book Air), however, is only connected to the web via a rather slow wireless network, and is still running 10.6. Now, my problem is that I'd also like to install Lion on the Air, however the connection is way too slow to download the new OS. Now, I was hoping I could just download Lion on the Mac Pro, then copy a kind of installer image onto a USB stick, pretty much like you could do with an OS X 10.6 installation DVD. However, this doesn't seem to be possible. So, is there any way I can copy an installer image to a USB drive, or is there any other way in which I can install a clean Lion on the Mac Book Air without having to download it through the slow connection?
Thanks a lot for any help!
Robin

Alberto Ravasio wrote:
If you make a Lion install USB once you downloaded Lion, you can start from a clean hard disk.
By "clean hard disk" do you mean, erase my internal drive and try use that?
Can I use an external hard drive instead of a USB key to create the "Lion install USB"?

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J

You say "by all accounts" ... please check, by going to the Apple menu, clicking About This Mac, and checking what is written under "OS X". (10.6.8? 10.7.4?)
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Hi there!
After last upgrade of kernel and video drivers i got a blank screen with no tty console.
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https://wiki.archlinux.org/index.php/US … tion_Media
https://wiki.archlinux.org/index.php/Chroot
https://wiki.archlinux.org/index.php/Downgrade
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Quit all other programs and open Disk Utility
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a. Open Disk Utility in your Utilities folder.
b. After DU loads select your flash drive (this is the entry with the mfgr.'s ID and size) from the left
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3. Use Lion DiskMaker 2.0 to put your installer clone onto the USB flash drive.
Note: The term Mountain/Lion used above means Lion or Mountain Lion.
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Partition and format the external drive properly:
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
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4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Boot from the flash drive you made. Select the external drive as the target, then install Lion.

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I've tried booting up in safe mode and ctrl-sys-r-p but all that happens is hours of watching the wheel spin. I had not set up File Vault so it shouldn't be for want of a File Vault password.
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Installing Lion from external media

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