I tried following all the steps listed above by as below to create an ISO of High Sierra: Running this in an existing vmware install of macOS High Sierra Mac:~ username$ cp -R /Volumes/highsierra/Packages /Volumes/OS\ X\ Base\ System/System/Installation cp: /Volumes/OS X Base System/System/Installation/Packages: File exists cp: /Volumes/highsierra/Packages: unable to copy extended attributes to /Volumes/OS X Base System/System/Installation/Packages: No such file or directory cp: /Volumes/OS X Base System/System/Installation/Packages/Core.pkg: No such file or directory cp: /Volumes/OS X Base System/System/Installation/Packages/EmbeddedOSFirmware.pkg: No such file or directory cp: /Volumes/OS X Base System/System/Installation/Packages/FirmwareUpdate.pkg: No such file or directory cp: /Volumes/OS X Base System/System/Installation/Packages/OSInstall.mpkg: No such file or directory I even re-downloaded the installation file just in case. When I run the script (edited for the final release) it fails on line 6. Hdiutil convert /tmp/ -format UDTO -o /tmp/HighSierra.iso Hdiutil attach /tmp/ -noverify -mountpoint /Volumes/install_buildĬp /tmp/BaseSystem.dmg /Volumes/OS \ X \ Base \ System Hdiutil create -o /tmp/HighSierra.cdr -size 8965m -layout SPUD -fs HFS J # Restore the 10.13 Installer's BaseSystem.dmg into file system and place custom BaseSystem.dmg into the root Hdiutil detach /Volumes/OS \ X \ Base \ System/ Hdiutil attach /tmp/ -noverify -mountpoint /Volumes/install_buildĪsr restore -source /Applications/Install \ macOS \ 10.13 \ Beta.app/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -eraseĬp -R /Volumes/highsierra/Packages /Volumes/OS \ X \ Base \ System/System/Installation Hdiutil create -o /tmp/HighSierraBase.cdr -size 7316m -layout SPUD -fs HFS J Hdiutil attach /Applications/Install \ macOS \ 10.13 \ Beta.app/Contents/SharedSupport/InstallESD.dmg -noverify -mountpoint /Volumes/highsierra Please download the iClarified app or follow iClarified on Twitter, Facebook, YouTube, and RSS for more Apple tutorials.# Generate a BaseSystem.dmg with 10.13 Install Packages Use software update or find links to download other macOS installers below. If your Mac doesn't support the very latest operating system, you may still be able to upgrade to a more recent OS. These Mac models are compatible with macOS High Sierra:Īpple recommends you install the latest Mac OS that is compatible with your device. Some features require a compatible Internet service providerįor details about your Mac model, click the Apple icon at the top left of your screen, choose About This Mac.14.3GB of available storage to perform upgrade.How to Make a Bootable macOS High Sierra USB Install Key. To create a bootable macOS High Sierra USB Installer, follow this tutorial: Check out gibMacOS for an automated tool. Expert users can use the following sucatalog link to retrieve the required components.
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