eGPU detected but not used [Catalina, mbp 2015 13" , Sonnet 550, AMX 580 8gb]
Clear all

eGPU detected but not used [Catalina, mbp 2015 13" , Sonnet 550, AMX 580 8gb]  


New Member
Joined: 1 year ago

Hi all,

Short time lurker, first-time poster. Recently I decided to get an egpu for MacBook Pro (Retina, 13-inch, Early 2015) running on Catalina 10.15.1 with an internal graphic card Intel Iris Graphics 6100 1536 MB.

I went with a built that has been proven to work:

- Sonnet Box 550

- AMD rx 580 xfx 8gb

- TB 3 to TB 2 Apple adapter and Apple TB2 cable.


I tried two methods:

- the purge-wrangler script

- the automate-egpu-efi (I made sure to choose Nvidia and add the Catalina workaround)


In both cases, the egpu is detected but no app uses it even though I used the set-egpu script. I tried with a video projector as an external display still no egpu activity. 

For reference, the about this mac shows the integrated graphic card.

I went through the troubleshooting guides and couldn't find a solution that works.

My questions are:

- Am I missing a step? How to make it work on the video projector?

- Is it possible to use the egpu with the internal display only? 

Relevant screenshots:




Thank you in advance for your precious help!





This topic was modified 1 year ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.