It took about 10-15 minutes in the case of my USB stick, but you’ll see a nice progessbar during the process. Next: Go to the Finder and drag InstallESD.dmg from there into the left hand pane of Disk Utility, then select it, go to Restore and drag the InstallESD.dmg into the Source field and your USB stick into the Destitination field. I used “Mac OS X Extended” format, but “Mac OS X Extended (Journaled)” should work as well. (Mine had 8 GB.) Start Disk Utility, erase and format the USB stick.

Make a backup first!įirst: Get an empty USB stick with more than 4 GBytes of capacity. Warning: I’m not taking responsibility if you format your harddrive and lose important data. Be aware to double – okay, make it triple – check that you select the correct devices during the process. I tried this and it did work (and was – as expected – much quicker to boot/install than the DVD). Be patient here! Update: The USB stick Here’s how you create an USB dongle version. Note: It took ages to boot from the DVD in my case. The resulting disk is bootable and you should be able to do a clean install.

dmg file that you can burn to a DVD using Apple’s own Disk Utility. Next: Navigate to Contents -> SharedSupport. If you got your files from somewhere else, I cannot help you.įirst: Go to the downloaded “Install Mac OS X” app that you downloaded via the Mac App Store, right click and select “Show Package Contents”. Note 2: This tutorial only applies to the official preview release that developers downloaded through the App Store. Note: I haven’t gone through a whole installation via DVD yet, only so far to get to the installer where it asks me on which drive I want to install the preview. The way to get that DVD/USB stick is rather simple but not quite obvious. Some of you do not want to use the installer but rather have a DVD (or USB stick) to do a clean install. Now that most of you might finally have finished the download, the next step is to install 10.7. Looking at yesterdays download speeds of the Lion developer seed, I guess many people were trying to get their hands on it.

Mac os x lion usb