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Finder Quick Actions- This is a useful feature that will allow users to create a PDF or rotate an image without the use of an app.

If this fails when the system reboots, you are effectively hosed, whereas at this point, being in the installer, you can still rescue files to an external disk.Here are some of the features that were introduced in Mojave and some of the pre-existing ones that have been reworked:

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cp '/Volumes/Install macOS High Sierra/Install macOS High Sierra.app/Contents/SharedSupport/InstallESDDmg.pkg' '/Volumes/Macintosh HD/macOS Install Data/'įinally, while you still have a functional version of the system booted, you should run a disk check. Here we must supply the installation package that this version of the installer thinks is already copied to disk. When the installer reboots, you must start from the CD again, but this time, don't run the installer but rather a start a Terminal from the Utilities menu at the top of the screen. There is a a caveat when using this CD: You must boot from the CD first, then run through the installer. Now the installation CD is ready, and can be burnt to a physical CD. Mv /tmp/HighSierra.cdr /tmp/HighSierra.iso hdiutil resize -size min /tmp/HighSierra.sparseimageĬaffeinate hdiutil convert /tmp/HighSierra.sparseimage -format UDTO -o /tmp/HighSierra

ISO format file that can be written to a physical disk. Shrink the image to the minimum size possible, and convert it into an

hdiutil detach '/Volumes/Install macOS High Sierra' Unmount theįilesystem within so that we can start to work on the image file itself. We are done with putting files into the installer image. diskutil rename 'OS X Base System' 'Install macOS High Sierra' SetFile -a C '/Volumes/OS X Base System/' cp '/Applications/Install macOS High Sierra.app/Contents/Resources/InstallAssistant.icns' '/Volumes/OS X Base System/.VolumeIcon.icns' sudo rm -rf '/Volumes/OS X Base System/Install macOS High Sierra.app'Ĭaffeinate sudo cp -a '/Applications/Install macOS High Sierra.app' '/Volumes/OS X Base System/' To reflect the setting in the source image.Ĭopying must be done as the superuser since it contains locked files that the normal user does not have access to. This will change the name of the volume from Untitled to OS X Base System, caffeinate asr restore -source '/Applications/Install macOS High Sierra.app/Contents/SharedSupport/BaseSystem.dmg' -target /Volumes/Untitled -noprompt -noverify -erase Now create a bootable image from the mini-system that is embedded in the installer. Hdiutil attach /tmp/HighSierra.sparseimage -noverify -nobrowse -mountpoint /Volumes/Untitled hdiutil create -o /tmp/HighSierra -size 12800m -layout SPUD -fs HFS+J -type SPARSE Please make sure that you don't have any other disks named Untitled currently in use. mv '/macOS Install Data' '/Applications/Install macOS High Sierra.app/Contents/SharedSupport'Ĭreate an image file with sufficient space to hold the DVD, in a format that is writable and growable, and mount it. You should move the entire top directory instead ofĬopying the files underneath it, because there are locked files which you ordinary user cannot access. This is best done by moving the files back into the required subdirectory. To create a bootable installer, these files must be available from within the installer directory, to be copied from there. The bulk of the downloaded files is put directly in an auxiliary directory in the root of the volume you selected in the installer. Rather select Quit from the application menu at the top of the screen. When you get to the final screen, do NOT click the Reset button, but

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Then it will start downloading the full version.

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If you got the stub, then you must run the program, accept the license and pick a target volume. It can appear random which systems that receive the full installation package and which only get the stub. On some systems, only a small stub of about 19MB is downloaded. This will create a directory called 'Install macOS High Sierra' under Applications.

First, you must download the High Sierra package from the Mac App Store.