1 - Confirm you have everything

  • SymplyPRO LTO Desktop drive
  • 2m (Intel certified) Thunderbolt™️ 3 cable
  • Power cord

2 - Prepare your Mac for installation

Macs equipped with either a T2 Security Chip or are Apple Silicon M1 based Macs ship by default with a Security Policy that blocks Third Party Kernel Extensions. Follow the [instructions in this article] to modify the Security Policy in Recovery Mode using the Startup Security Utility to enable your Mac to communicate with your Symply products.

3 - Install Symply ATTO driver

3a - Download installer package

Driver and utility downloads are available on the [Symply Support site]


3b - Install

Double-click the installation package and follow the prompts in the Installer app to complete the installation. Do Not Restart the computer when prompted to do so by the ATTO installer.  It is important to confirm kernel extension permissions before the system is restarted.

3c - Confirm kernel extension permission

During installation a pop-up will present itself requesting permission to allow the kernel extension to be loaded.

Clicking in the prompt on Open Security Preferences opens System Preferences > Security & Privacy > General tab, where you will see the following prompt. Click on the checkbox next to ATTO Technologies, Inc. to enable the kernel extension to load at the next (and subsequent) boot time.

macOS Monterey

macOS Ventura

3d - Restart

Once the ATTO kernel extension has been given permission to load, the system will ask to restart. When the Restart button is selected, a message is displayed stating that the system extension cache is being rebuilt and the Mac will restart.


If you have any questions please submit a [support ticket]