Our website provided a free download of ATTO ExpressPCI 3.2 for Mac. This free software for Mac OS X is a product of ATTO Technology, Inc.
From the developer:
ATTO ExpressPCI contains the drivers for the ExpressPCI SCSI card adapter.
You may want to check out more software for Mac, such as ATTO Disk Benchmark, which might be related to ATTO ExpressPCI.
Device Assistants