The RAM disk size specified by Apple’s installer is too small to hold anything but payloadless packages. This is where additional packages get placed. During startup - whether from DVD or via NetBoot - the installer creates a RAM disk to hold the contents of the /private/var directory. The reason we need to modify the disk image is because, since 10.5.7, the System Image Utility can’t properly handle additional packages that you add into your workflow. When the disk image is done, eject the DVD, select the disk image on the left side of the window, and click the Open icon in the toolbar to mount it.Click Save to create the read/write disk image.
Rename the image if you like, choose a location to save it, and change the Image Format option to read/write.Select the Install DVD from the list on the left, then click the New Image icon in the toolbar.Insert the OS Install DVD into your drive and then launch Disk Utility (found in /Applications/Utilities).I’ll walk you through how to implement it here. Make a Read-Write Installer Disk ImageĪs of Mac OS 10.5.7, there has been a bug in in the OS installer that prevents you from successfully adding sizeable packages to your System Image Utility. (Yes, it’s not a Combo Update, but only because it’s a. Optional: the latest Combo Updater - 10.6.1 as of this writing.This is a hidden folder, so use Go to Folder from the Finder’s Go menu to reveal it. A copy of the OSUpgrade.pkg found on the Install DVD at /Volumes/Mac OS X Install DVD/System/Installation/Packages.A computer running OS X Server providing NetBoot services - Tiger, Leopard, and Snow Leopard Server will all work.One build computer running Snow Leopard with the latest version of Snow Leopard’s Server Admin Tools installed (10.6.0 as of this writing).You’ll convert this to read-only after making a small modification to one of the files. A read/write disk image (.dmg) of a Mac OS X v10.6 Snow Leopard Install DVD (i.e.A 10.6 software license, or individual retail copy of Leopard, for each computer you are upgrading from Leopard or Tiger to Snow Leopard - this is easily overlooked, so let’s keep things legal.It will also work to upgrade a Mac running Tiger to the latest version of Snow Leopard.
This post will tell you how to create a NetInstall image that will upgrade a Mac running Leopard to the latest version of Snow Leopard in one step. This post is a Snow Leopard update to a process I wrote about when Leopard (10.5) came out. I submitted the bug that this workaround avoids to Apple - id #7247968 - on September 23, 2009. UPDATE (10/13/09): I’ve updated the article (and posted it as new) with a workaround for the issue that prevented additional packages from being installed. I’m working on and testing an extended workaround that should fix the problem for everyone. UPDATE (10/15/09): I’ve gotten mixed results from some individuals who’ve tried the workaround with 10.6.1.
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