Step 1

Start with eGPU disconnected.

Click Apple logo in the top left corner and click About this Mac.

Step 2

Click Version to see build number. Make sure to have the latest version of macOS Sierra or High Sierra for NVIDIA cards.

For macOS High Sierra the latest version is 10.13.6 (build 17G14042). For macOS Sierra the latest version is 10.12.6 (build 16G2136).

For AMD cards we recommend the latest version of macOS Monterey 12.7.6 (build 21H1320).

If you don't have the latest version or build click Software update and update it (it might not upgrade directly to the latest version so you might need to check this section a few times).

Step 3

From Finder topbar click Go then Utilites.

Step 4

Double click Terminal icon to launch Terminal.

Step 5

Type a following command:

sudo nvram enable-legacy-orom-behavior=1

and press ENTER.

Terminal will ask for password. Type your user password and press ENTER (password won't be shown not even under asterisk).

Step 6

This step is needed only for NVIDIA cards.

Proceed with standard NVIDIA Web Driver installation followed by CUDA driver (make sure the eGPU is still not connected!): Installing NVIDIA Web Driver / CUDA driver under macOS

Please use this driver for macOS High Sierra: https://pics.macvidcards.eu/webdriver-387.10.10.10.40.140.pkg

Please use this driver for macOS Sierra: https://images.nvidia.com/mac/pkg/378/WebDriver-378.05.05.25f19.pkg

Finally this CUDA driver for macOS High Sierra: https://pics.macvidcards.eu/cudadriver-418.163-macos.dmg

This CUDA driver for macOS Sierra: https://www.nvidia.com/en-us/drivers/cuda/macosx-cuda-9-0-197-driver/

When you are ready with WebDriver and CUDA driver installation then you can finally connect and run your eGPU with our another guide.