ATTO Software Downloads

The following are current versions of ATTO drivers and software.

Click here for archived ATTO drivers and software. Drivers and software for discontinued ATTO products are here.

If a driver or software package does not appear on this list, it may still be available by contacting ATTO Tech Support.

The current sort appears below. SEARCH the sorted file listing using the search box (when each sort filter is set to “all”, all files are searched).

ATTO Product:
Celerity

Product Family:
Celerity 8Gb HBAs

Operating System:
All

Title
Celerity 8Gb Fibre Channel Driver Linux
Updated: July 7, 2026
Files in Package:
  • Driver Version (v2.30.6) 1 MB
  • Product Release Notes 256.6 KB
 Proprietary Linux device driver for 8Gb Celerity Fibre Channel Host Bus Adapters.

Supports the following Linux Distributions: Red Hat Enterprise Linux 8, 9  & 10, Rocky Linux 8, 9 & 10, openSUSE Leap 15 & 16, SUSE Linux Enterprise Server 15 & 16, Ubuntu 22.04 LTS & 24.04 LTS. 		Download
Celerity 8Gb Fibre Channel Driver macOS
Updated: July 7, 2026
Files in Package:
  • Driver Version (v3.38.1) 1.85 MB
  • Product Release Notes 273.22 KB
 macOS device driver for 8Gb Celerity Fibre Channel Host Bus Adapters.

Supports the following macOS Versions: macOS 26 Tahoe, macOS 15 Sequoia, macOS 14 Sonoma & macOS 13 Ventura.

In macOS 11, Apple introduced User-Approved Kernel Extension Loading. For additional information on this update, please visit here.

When installing an ATTO driver on macOS, you may get a pop-up message warning stating that “this is a system extension that will be incompatible with a future version of macOS.” There is no need to be concerned. ATTO currently uses Kernel Extension Drivers to provide the highest-performing drivers possible. 		Download
Celerity 8Gb Fibre Channel Driver Windows
Updated: July 7, 2026
Files in Package:
  • Driver Version (v2.14.1) 3.71 MB
  • Product Release Notes 193.45 KB
 Windows device driver for 8Gb Celerity Fibre Channel Host Bus Adapters.

Supports the following versions of Windows: Windows 10, 11 and Windows Server 2016, 2019, 2022 & 2025. 		Download
Celerity 8Gb Fibre Channel Flash Bundle Linux
Updated: February 19, 2025
Files in Package:
  • Flash Bundle version (v04/06/2018) 687.18 KB
  • Product Release Notes 127.32 KB
 Linux flash bundle for Celerity 8Gb Fibre Channel adapters.

Instructions on how to flash can be found in the ReadMe downloaded with the flash bundle file.

Supported Products: Celerity FC-81EN, Celerity FC-82EN and Celerity FC-84EN.

  		Download
Celerity 8Gb Fibre Channel Flash Bundle macOS
Updated: February 19, 2025
Files in Package:
  • Flash Bundle version (v04/06/2018) 1.37 MB
  • Product Release Notes 127.32 KB
 macOS flash bundle for Celerity 8Gb Fibre Channel adapters.

Instructions on how to flash can be found in the ReadMe downloaded with the flash bundle file.

Supported Products: Celerity FC-81EN, Celerity FC-82EN and Celerity FC-84EN. 		Download
Celerity 8Gb Fibre Channel Flash Bundle Windows
Updated: February 19, 2025
Files in Package:
  • Flash Bundle version (v04/06/2018) 687.21 KB
  • Product Release Notes 127.32 KB
 Windows flash bundle for Celerity 8Gb Fibre Channel adapters.

Instructions on how to flash can be found in the ReadMe downloaded with the flash bundle file.

Supported Products: Celerity FC-81EN, Celerity FC-82EN and Celerity FC-84EN. 		Download
Celerity 8Gb Fibre Channel Multi-Path Director Driver macOS
Updated: July 7, 2026
Files in Package:
  • Driver Version (v3.38.1-MP) 2.12 MB
  • Product Release Notes 315.92 KB
 ATTO MultiPath Director is a proprietary driver that enables macOS hosts to connect to storage systems that support ALUA for failover, failback and load balancing across Fibre Channel ports.

Supports the following macOS Versions: macOS 26 Tahoe, macOS 15 Sequoia, macOS 14 Sonoma & macOS 13 Ventura.

In macOS 11, Apple introduced User-Approved Kernel Extension Loading. For additional information on this update, please visit here.

When installing an ATTO driver on macOS, you may get a pop-up message warning stating that “this is a system extension that will be incompatible with a future version of macOS.” There is no need to be concerned. ATTO currently uses Kernel Extension Drivers to provide the highest-performing drivers possible. 		Download
Celerity 8Gb Fibre Channel MultiPath Director Driver Linux
Updated: July 7, 2026
Files in Package:
  • Driver Version (v2.30.6-MP) 1.32 MB
  • Product Release Notes 284.78 KB
 ATTO MultiPath Director is a proprietary driver that enables Linux hosts to connect to storage systems that support ALUA for failover, failback and load balancing across Fibre Channel ports.

Supports the following Linux Distributions: Red Hat Enterprise Linux 8, 9  & 10, Rocky Linux 8, 9 & 10, openSUSE Leap 15 & 16, SUSE Linux Enterprise Server 15 & 16, Ubuntu 22.04 LTS & 24.04 LTS. 		Download
MultiPath Director Windows
Updated: February 18, 2026
Files in Package:
  • MultiPath Director Version (v2.26) 2.24 MB
  • Product Release Notes 255.22 KB
 ATTO MultiPath Director is a proprietary driver that enables Windows hosts to connect to storage systems that support ALUA for failover, failback and load balancing across Fibre Channel ports.

Supports the following versions of Windows: Windows 10, 11 & Windows Server 2019, 2022 & 2025.

Requires the latest Windows Device Driver to also be installed alongside the MultiPath Director. 		Download