Hi Nico –
I am very impressed with your research. The link you posted in fact has the MAC driver, but NONE of the Highpoint literature or charts indicate that they have ANY support for Macintosh for this product -see below – (I would love to know how you found this link). ——
The RocketRAID 2320 supports advanced RAID levels 0, 1, 5, 10, and JBOD for maximum configuration flexibility. HighPoint offers the broadest range of support for all major operating systems to ensure OS and hardware server compatibility.
Drivers are available for all major operating systems, including Windows, Linux, FreeBSD. Open source is also provided for Linux and FreeBSD.
Specification
Host Side Interface PCI Express X4 (X8 slot compatible)
Device Interface
Serial ATA
Number of Channels
8 Device Channels
Allowed Disk Connection
8 SATA II or SATA I hard disks
Supported RAID Levels
RAID 0, 1, 5, 10, JBOD
Operating Systems Support Windows, Windows X64 Editions, Linux(opensource), FreeBSD(opensource)
RAID Management Tool BIOS
Browser-based RAID Management
CLI
Some Highlighted Features
Hot swap/hot spare
Single RAID Cross Adapter 64-bit
LBA support for over 2TB support
Drive activity / Failed LED
SAF-TE chassis management
SMTP support for email notification