Before installing a correct driver, there are few steps that need to be done depending on what kind of Mac hardware you have. there are three major hardware variations:
a. M1-5 Apple Silicon based chipset based
b. Intel based with T2 security chip
c. Intel based without T2 security chip.
very easy to identify which one you have.
M1 based - Go to, About This Mac --> Overview. if it doesn't say Chip Apple M1 there, please follow the link to find out if you have b. or c. https://support.apple.com/en-us/HT208862
For a. you need to select 'Reduced Security' in 'Startup Security Utility'. see here how to get there
https://support.apple.com/guide/mac-help/change-security-settings-startup-disk-a-mac-mchl768f7291/mac
for b. Go to Startup Security Utility and select 'No Security' under 'Secure Boot'. see here how to get there
https://support.apple.com/en-us/HT208198
for c. Nothing to do, you are ready to continue.
Security Settings on Mac
As of macOS High Sierra 10.14, a new security feature was introduced that requires user approval before installing driver software. Go to your Mac System Preferences > Security & Privacy panel to allow the system extension so your driver will work properly.
For more details, please see: http://developer.apple.com/library/content/technotes/tn2459
Please check to make sure you are downloading the correct driver.
This driver is Specifically for the MagStor Base series Thunderbolt Desktop drive.
TRB5-L8-BASE
Revision FB Drivers
macOS 13.x and later
*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.
Windows 11/10 (64-bit), Server 2025/2022/2019/2016 (64-bit)
Verifying Driver Install(macOS)
With the drive powered on and initialized you should be able to check the system information and verify thunderbolt and FC connectivity.
---------------------------------------------------------------------------------------------------------------------------------------
Applying Driver Install (Windows)
1) Open Device Manager
2) Select "Other devices" "Fibre Channel" that should have a yellow mark indicating there is not a driver installed
3) Select "Update driver"
4) Select the driver files downloaded and apply