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Old 12-21-2017, 06:42 PM   #1
serr
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Join Date: Sep 2010
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Default Adventures installing OSX 10.13 High Sierra!

Download the OSX 10.13 High Sierra installer:

Note: The default is a small 20mb incomplete file that will download the full installer on the fly. If you get disconnected, you start over. Also much harder to make a USB installer drive. So use this 3rd party utility instead.

Download the High Sierra Patcher Tool from: http://dosdude1.com/highsierra/

This app includes a simple utility to download the complete installer file form Apple. This app also includes a utility to create a patched USB installer drive that fixes the “unsupported machine” bug that comes up with some random models between 2008 - 2012.

Do a clean install, not an update!

Do a clean install to a freshly formatted drive. HFS+ is supported but APFS is recommended for High Sierra (except this is debated and APFS isn’t working at all on some machines). Migrate from an old system to a clean install rather than updating!

Dosdude patch install:

Boot from the patched installer USB drive/stick and follow the usual instructions.

Note: The version of Disk Utility included with the installer is missing the ability to format a new blank previously unformatted drive. Format that ahead of time with another machine! Drives with an existing format can be reformatted.

Boot from the installer drive again immediately after install and run the post install patches, following instructions per model.

Note: Carbon Copy Cloner 4.1.20 successfully clones the 10.13 system.

There are still some systems the patched installer will not work with! You will still get the "unsupported machine" message. You need to manually patch the installer for this.

Instructions to manually patch the installer:

Use the same full installer app downloaded from Apple above.
(The following assumes the installer app is in /Applications and you have a drive mounted named Untitled.)
Enter the following terminal command:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled

Enter password when prompted.

Patch the installer:
Right-click on the installer app file on the USB drive and click ‘Show Package Contents’. Browse to Contents/SharedSupport/ and delete the file named InstallInfo.plist

Boot from the installer USB drive.
Before running “Install OSX”, the machine needs to be connected to a network with internet access. The system time/date needs to be correct for a CERT validation and the command to do so is missing from the installer.
Click the wifi icon top right and connect to the local network with internet.
Launch the Terminal from the Utilities menu and enter: ntpdate -u time.apple.com
Now select and run ‘Install OSX’

The Dosdude patched installer will work for most machines. If you still get the “unsupported machine” message, try the manual patch.

The manually patched installer is working for at least some of the machines missed by the Dosdude patch. However, some of the machines with fixed support from the Dosdude patch will not have success with the manual patch. The Dosdude patch only fixes the installer for certain machines and the manual patch only fixes it for certain others.


Some issues and disagreement with the new APFS disk format!

This new format is recommended for SSD’s.
There are both recommendations to avoid and embrace it.
I’ve seen two things personally.
1. I first installed 10.13 on a HFS+ formatted volume. That seemed to go fine but running the OS update to update to 10.13.2 resulted in a DOA.
Starting over and installing 10.13 clean on a APFS formatted volume and the following 10.13.2 update was successful.

2. I was not able to successfully install 10.13 on an APFS formatted SSD volume on a 13” mid 2012 Macbook Pro. It would crash after the first reboot and the second phase of install would not complete. Installing to a HFS+ formatted volume on this model was successful. I haven’t tested the 10.13.2 update yet here. This is also the machine that did not work with the Dosdude patched installer and required the manually patched version.


Have fun!

Last edited by serr; 12-21-2017 at 06:47 PM.
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