Thank you for buying your 2017 iMac 5K and/or iMac Pro at B&H Photo, and for upgrading it at OWC MacSales.com. Both vendors made and make my extensive tests of the Apple iMac Pro and other Macs and gear possible.
Not sure which Mac you need, or how to configure it, plan for backup, etc? Consult with Lloyd.
Update 17 Jan 2018: SoftRAID is now updated to work fully with macOS 10.13.2 High Sierra but that does not fix this issue with the iMac Pro.
Update 22 Jan 2018: By turning off secure booting this issue goes away. SoftRAID developers are working on a better solution. See Apple’ About Secure Boot which discusses how to use the Startup Security Utility to change security. Available only on iMac Pro.
SoftRAID has an issue with the iMac Pro in that it keeps reinstalling the driver in an infinite loop. To work around the problem:
- Let it install the driver once (or twice, doesn't matter).
- Reboot, but before the machine can start booting, turn off all SoftRAID devices.
- Turn on SoftRAID devices.
- Go into and allow the SoftRAID driver to load.
Rebooting should be OK now too. But one problem I ran into with no apparent solution is that the SoftRAID app is unusable, since it not only immediately insists on reinstalling the driver, but it hung for me, forcing me to kill it.
The SoftRAID team is working on the issue, so MPG is told.