The issue is APFS specific. So your options are:
1. Clean Install: Install to a standalone drive (separate from your SSDs), then use Disk Util to create or format your two SSDs RAID 0 and make sure it is formatted Journaled HFS+. Then clone the single drive to the RAID 0 volume and it will work.
I had tried this method using APFS on the RAID and it fails to boot. So the issue is APFS *can't* boot from RAID.
2. You can try upgrading to High Sierra, but without converting the file system to APFS. (I have not tried this myself).
Download High Sierra, but do not install it, then from the command line run:
/Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/startosinstall --converttoapfs NO --volume /DestinationDriveName
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Short answer - DON'T DO IT!
We will need to wait a bit until Apple releases an update for High Sierra with RAID support for APFS. Stick with Sierra for now!
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0
When will I know when this happens?
crwdns2934271:0crwdnd2934271:0 Gianna520 crwdne2934271:0
you can install it on a USB Drive and the start from it, then create the RAID with the RAID assistent in the disk utility app, the n clone the USB with SuperDuper App to the RAID. now boot from the RAID with holding ALT at startup and set the startup disk to the RAID. but be aware all data on the drices will be erased when creating the RAID.
you can also clone your current OS on the RAID to a USB drive and update the USB to High Sierra an then clone it back with SuperDuper
Greetings Thomas
crwdns2934271:0crwdnd2934271:0 Thomas Binderhofer crwdne2934271:0
Great workaround and this will work. That said, I am not 100% confident in it upgrading with any future releases. I think I will wait till the 10.13.3 release and hope it addresses this issue as well as the root security exploit.
crwdns2934271:0crwdnd2934271:0 Peter Bishop crwdne2934271:0
I think I'll let Apple finish High Sierra... This looks like one of those Microsoft Operating Systems (Win ME, Win Vista, Win 8)... I think for the first time in my life I'll skip a Mac OS version.
crwdns2934271:0crwdnd2934271:0 Caboz crwdne2934271:0
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