I have upgraded my 2009 Mac Pro to macOS Mojave with a 141 boot ROM. I have a Squid with 4 x 512 NVMe Samsung Pro 970s, setup as RAID 0 and formatted APFS. My primary boot drive is a Kingston HyperX Predator AHCI drive. I'm trying to install macOS Mojave onto the Squid RAID drive and migrate everything over to that. However, when I run the installer and choose the Squid RAID volume, it starts the installation but then I get the following error: > Could not create a preboot volume for APFS Since posting this, I've been reading that macOS Mojave will not boot from a RAID volume via any supported configuration. Does anyone know if this is still true with the latest boot ROMs? Any one know what I need to do to get past this problem?