Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 115)

DRIVER INSTALLATION
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4.6 Driver Installation for macOS
After hardware installation, the SAS/SATA disk drives connected to
the tri-mode RAID adapter must be configured and the volume set
units initialized by the adapter before they are ready to use by the
system.
4.6.1 Installation Procedures
This section describes detailed instructions for installing the Areca
Mac driver & utility for the ARC-1883 series on your Intel_based
Mac Pro. You must have administrative level permissions to install
Mac driver & utility.
4.6.1.1 Install Areca driver for Mac
On November 10, 2020, Apple revealed new Mac hardware with
the revolutionary Apple Silicon M1 processors. Since external
boot via 3rd party drivers is not allowed on Apple Silicon based
Macs, the default Areca driver doesn’t work on new M1 Mac,
only for Intel-based Macs.
The macOS 11 had not been integrated any universal KEXTs into
macOS, which means that users need to install universal KEXT
to support Areca Thunderbolt devices on Apple Silicon. Areca
universal KEXT’s on Apple Silicon can be installed in /Library/
Extensions/, even if Areca RAID storage x86-only versions
persists on the system in /System/Library/Extensions/. In order
to use 3rd party kernel extensions on Apple Silicon Macs, users
must enable system extensions by changing their Mac’s Security
Policy to Reduced Security and allow user management of kernel
extensions from identified developers.