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eGPU + New Lightroom 8.4 + Mojave + Apple TB Display
 

eGPU + New Lightroom 8.4 + Mojave + Apple TB Display  

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vicmarto
(@vicmarto)
New Member
Joined: 1 month ago
 

Hello my friends,

I'm looking to get a eGPU to benefit from the new GPU capabilities of the 2019 August update of Lightroom. This is with a 2018 Mac mini connected to a Thunderbolt Apple Display (via Apple adaptor TB2>TB3).

BUT, I'm anticipating some problems I want to ask about:

  • Seems Lightroom only use the GPU (for image processing) when the monitor is connected to the eGPU, according to these pictures. I'm right? This will be problematic, because of the difficulties to connect the Thunderbolt Apple Display to the eGPU...
  • Ideally would be to use the internal graphics to drive the Thunderbolt Apple Display, and use the eGPU only to speed up Lightroom. Maybe this can be forced using the "Prefer External GPU" switch. But... Lightroom honor this switch?

Please, someone with an eGPU and the new Lightroom can answer this two questions please? THANKS!

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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joevt
(@joevt)
Honorable Member
Joined: 2 years ago
 

Someone with an Apple Thunderbolt Display uses a BlackMagic eGPU to connect the display:
https://egpu.io/forums/mac-setup/blackmagic-egpu-and-bootcamp-with-a-mac-mini-2018/#post-64049

You could connect the display to an externally powered GC-ALPINE RIDGE card, but then you can't use any of the non-display features of the display.

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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vicmarto
(@vicmarto)
New Member
Joined: 1 month ago
 

Thanks joevt for your answer. Yes, the Blackmagic eGPU can be a solution to use the Apple Thunderbolt Display, but I'm afraid this will came with one big problem: I will loss the ability to see the boot screen, and consequently the capacity to unlock a FileVault boot disk.

If I want to retain the ability to use FileVault, seems I must use the eGPU like a secondary graphics, and drive the display with the internal graphics. Please, someone has a eGPU and the new Lightroom to test this configuration?

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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joevt
(@joevt)
Honorable Member
Joined: 2 years ago
 

Posted by: @vicmarto

 I will loss the ability to see the boot screen, and consequently the capacity to unlock a FileVault boot disk.

Catalina will probably fix that.
https://egpu.io/forums/mac-setup/mac-mini-2018-egpu-boot-screen-support/

Until then, there is the externally powered GC-ALPINE RIDGE option if you want to be sure about Lightroom and if no-one has an answer for your question.

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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itsage
(@itsage)
Famed Member Admin
Joined: 3 years ago
 

@vicmarto I don’t think the display needs to be directly powered from the eGPU. If you check the the box “Use GPU for image processing” you’ll see “Full graphics acceleration is enabled”.

Best ultrabooks for eGPU use

eGPU enclosure buying guide


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vicmarto
(@vicmarto)
New Member
Joined: 1 month ago
 

@itsage

Seems you were right itsage: https://forums.adobe.com/message/11225104

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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