UPDATED: v1.22 adds the a check to see if your flash disk is correctly formatted already. This should in theory not destroy other volumes on your flash disk but as always make sure you have backups of your data on the flash drive you are using. Also, it would appear at this time that 10.6.x versions of OS X are not compatible with the tools needed to create the install media. Unfortunately this is an Apple thing and something I won’t be able to fix.
Mavericks is finally here and how awesome is it that Apple is now giving it away for free. For all those that can upgrade this is a fantastic update and on my Macbook Pro 2011 I have noticed significant performance increases. It seriously feels like a new computer.
As with all major updates I just don’t trust doing upgrades. I know Apple has made huge strides to make upgrades as painless as possible but I always like to start from scratch. For one, it makes it easier to troubleshoot knowing that I don’t have any previous baggage mucking my system up and second I get to spend time cleaning up the mess I have on my computer. Sorta like forced spring cleaning in the fall ;).
So, as with previous versions of OS X, I went ahead and tried to create my bootable installer as always and found out it doesn’t work. After a bit of research I came across a post identifying a new tool Apple has to create a bootable install disk. Unfortunately, it isn’t the most user friendly for novice users. Have no fear weary adventurers I have created a nice little script to make your life easy. Read on for the details and please read the whole post so you understand what happens.
Install OS X Mavericks – From the App Store – It is free so go get it.
One 8 GB USB Flash Drive – you could use an external hard drive but why when an 8GB thumb drive is 6 bucks.
Once you have both of those run my apple script. The script will ask you to choose your install media, that would be the 8GB flash drive, as well as the location of your Install OS X Mavericks installer. Below is what the process looks like.
1. Launch the Applescript. Click OK after you read the dialog box.
3. This screen should validate that you selected the correct drive to create your Mavericks boot disk. Once you click OK it will format the drive as a GUID bootable disk. This is absolutely necessary in order to create the proper partitioning scheme that OS X can boot from. If you use an external drive or a thumb drive that has multiple partitions it will destroy all of those extra partitions, hence my suggestion of a dedicated thumb drive.4. Next select your “Install OS X Mavericks” app that you downloaded from the App Store.
7. Once you have entered the correct password you should see the process start and something that looks like the following. The time it takes will very. On really fast disks it only takes 3 to 5 minutes. On the thumb drive I used it took closer to 20 to 25 mins. BE PATIENT! 😉
8. If everything worked correctly you should see this.
I hope this helps those looking to start clean.
Link to Program: Mavericks Bootable Installer v1.22
If you are running 10.6.x use this article to create an installer.
Keywords: apple mac mavericks 10.9 boot clean install OS X disk