3/14/2024 0 Comments Make bootable usb from dmg sierra![]() You should now see the normally hidden BaseSystem.dmg file in the mounted volume.Unfortunately, you can’t just grab it and restore it. There you will see the InstallESD.dmg file. Navigate to the Contents/SharedSupport.Right-click it and select ‘Show Package Contents’. After download you will have the ‘Install OS X 10.9′ app in your /Applications folder.(At time of writing this is only possible for those with access to the developer previews). Download the installer as normal from the app store.So start by opening Terminal.app and pasting in the following (don’t worry, we’ll undo this change when we are done)… defaults write AppleShowAllFiles YESkillall Finder You are going to need to see some hidden files for this.You will need at least a 8GB Flash Drive (USB 3.0 is obviously a better choice). The Marek Bell blog notes that creating a bootable flash drive of Mavericks is a bit more intricate than Mountain Lion because “it is no longer possible to simply restore the InstallESD.dmg to get a bootable image for USB / Flash drive installation.” But there is a way around this obstacle, which Marek outlines in his thorough walkthrough of creating a bootable OS X Mavericks flash drive.
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